EXHIBIT 21.1 TYCO INTERNATIONAL LTD. Subsidiaries at 30 Sept. 1999 ARGENTINA: A&E Argentina, S.A. AMP Sociedad Anonima Argentina Comercial Industrial Y Financiera Grinnell Sistemas de Proteccion Contra Incedio S.A. de C.V. Intecva Sudamericana S.R.L. Interco Argentina S.A. Metalurgica Bellucci S.A. Raychem S.a. Industrial & Comercial AUSTRALIA: 000 233 536 Pty. Limited(1) ACN 000 343 019 Pty Ltd. ADT Security Pty. Ltd. Australian AMP Pty. Limited Auto Suture Holdings Pty. Limited Coastline Foundry (Qld) Pty Limited Command Investments Pty. Limited Complete Engineering Group Pty. Limited Danby Pty Limited Environ Pty. Limited Fire Control Pty Limited Firefair Pty Limited Firepipe Protection Pty Limited Firmagroup Operations Holdings Pty Limited Gold Energy (Aust) Pty. Limited Graphic Controls (Australia) Pty. Ltd. Grinnell Asia Pacific Pty Limited(2) Grinnell Building Products Pty. Limited Haden Engineering Pty Limited Haden F M Pty Limited Haden Staff Superannuation Fund Pty Limited Kalanda Enterprises Pty Ltd Keystone Asia Pacific Pty. Ltd. Mather & Platt Pty. Ltd. MB John Limited Metropolitan Fire Systems Pty Limited MFS Holdings Pty Limited Nationguard Security Pty Limited Panmedica Pty. Ltd. Raychem (Australia) Propietary, Ltd. Sherwood Medical Industries Pty. Limited Super Nomines (NSW) Pty Limited Steel Mains Pty Limited Swan Metal Skirtings Pty. Limited TISP Pty Limited Tyco Australia Pty. Ltd. (ACN 008 399 004)(3) Tyco Building Products Pty Limited Tyco Engineering and Construction (Asia) Pty. Ltd. Tyco Flow Control Pacific Pty. Limited Tyco Grinnell Asia Pacific Pty Limited Tyco Healthcare Pty Limited Tyco International Pty Limited Tyco Water Pty Ltd. Valleylab Australia Pty.Limited Viking Fire Systems Pty Limited Yarway Australia Pty. Ltd. AUSTRIA: AMP Osterreich Handelsgesellschaft m.b.H. Auto Suture Austria GmbH Raychem GmbH Total Walther Feuerschutz und Sicherheit GmbH Zettler-Elektro GmbH. BAHAMAS: Newington Limited World Services Inc. BARBADOS: Central Sprinkler Export Corporation Exeter Holdings Limited Dexide Foreign Sales Corporation Graphic Controls Barbados Limited INBRAND FSC Inc. Kendall International FSC, Inc. Keystone FSC Ltd. Raychem Foreign Sales Corporation SWD Foreign Sales Corporation TSSL Foreign Sales Corporation TVM Foreign Sales Corporation Tyco International Sales Corp. USSC FSC, Inc. BELGIUM: 1991 CIPE Benelux 1994 WHICH ADT Security Services S.A. Alarm Centrale AMP Belgium Auto Suture Belgium B.V. B.V.B.A. Alarm Cebtrale S.P.R.L. Intervalve B.V. N.V. ADT Security Services S.A. N.V. Airvans Belgium S.A. N.V. CIPE Belgium S.A. N.V. Firman Schevelenbosch-Alarm-Beveiliging Systemen S.A. N.V. WHICH Belgium S.A. N.V. Wormald S.A. Raychem China Limited NV Raychem Industries NV Raychem NV Tyco Flow Control Europe Tyco Healthcare Belgium S.A. Vonk Enschede BV Wormald S.A. Zettler Belgique S.A. BERMUDA: AMP Exports Limited Camron (Bermuda) Insurance, Ltd. Cawich Limited Electro-Protective Limited Kral Steel, Ltd. Tyco Alpha Limited Tyco Beta Limited Tyco Delta Limited Tyco Epsilon Limited Tyco Eta Limited Tyco Gamma Limited Tyco Holdings Limited Tyco Kappa Limited Tyco Lambda Tyco lota Limited Tyco Omega Tyco Omicron Tyco Rho Tyco Sigma Limited Tyco Theta Limited Tyco Zeta BORNEO: Wormald (Borneo) Sdn. Bhd. BRAZIL: AMP DO Brasil Conectores Eletricos E Eletronicos Ltda. Auto Suture do Brasil Ltda. Batts do Brazil Crosby Valve & Gage Participawes Ltd. Grinnell Sistemas de Protecao contra Incendio Ltda. Hitech Harness Industria E Comercio de Componentes Electricos E Electronicos Ltda. Keystone do Brasil, Ltda. Micro-Onda do Brasil-Comercio e Industria de Equipamentos Electronicos Ltda. Microwave Electronica E Telecomunicacoes Multiservice Engenharia Ltda. Raychem Productos Irradiados Limitada Valvulas Crosby Industria e Commercio Ltd. BRITISH VIRGIN ISLANDS: Somerset Holdings Ltd. CANADA: 1057673 Ontario Inc. 311313 Alberta Ltd. 3598900 Canada Inc. 495649 Ontario Limited 597237 Alberta Ltd. 620919 Ontario Limited 919551 Ontario Inc. 921150 Ontario Inc. ADT Finance, Inc. ADT Canada Holdings Limited (72.84%) ADT Security Services Canada, Inc. Alarmcorp. Ltd. Alarmex Ltd. AMP of Canada, Ltd. ASL Alarm Supplier Ltd. Batts Enterprises (Canada) Ltd. Cantech Corporation Century Industries Company Code Red Fire Services, Ltd. Code Red Security Systems, Corp. Columbia-MBF Inc. (3589790) Detron Safety Inc. Drapeau Fire Protection Limited Earth Tech (Canada) Inc. Firecom Sales & Consulting Firefighter Protection/Mobile Fire Extinguisher Recharging Ltd. Fireworks Fire Protection Ltd Fireex Industries Calgary Inc. Firex Industries Inc. Foothills Fire Equipment Ltd. Freedom Systems Ltd. Forward Safety Systems (Eastern) Inc. Forward Safety Systems, Inc. Gormae Holdings Inc. Graphic Controls Canada, Ltd. Hawley Group Canada Limited Hawley International Finance Limited Hi-Line Holdings Ltd. Inbrand Corporation (Canada) Inc. Jenteck Controls Ltd. Keystone Canada, Co. M/A-COM Limited Minervatech Inc. Murphy Fire Systems Ltd. National Alarm Systems Ltd. Niagara Fire Extinguisher Co. Ltd. P.A.L. Enterprises Inc. Proctor & Redfern International Limited Protec Industries Alberta Ltd. Parkwood Security Services, Inc. Protective Alarms of Canada Inc. Raychem Canada Limited Rovalve Canada Ltd. Rust Environment & Infrastructure of Canada Inc. Serv-Alarm Limited Serv-Alarm Niagara Serv-Alarm Toronto Ltd. Sheldon Machine Shop Inc. Sheldon Valve Sales Ltd. SKS Fire & Communications Inc. Spanguard Devices, Inc. Tyco Healthcare Group Canada Inc. Tyco International of Canada Ltd.(4) Tyco Valves & Controls Canada Inc. Unistrut of Canada Limited Universal Electronic Protection Inc. CAYMAN ISLANDS: Davis & Geck Caribe Limited Davis & Geck Limited Raychem International CHILE: AMP de Chile Conectores Electricos Y Electronicos Limitada Comercial Kendall (Chile) Limitada Grinnell Sistemas de Proteccion Contra Incedio, S.A. (Chile) Inprotecto SA Kendall de Chile de S.A. Raychem Industrial Y Comercial Limitada Simplex S.A. Tyco Flow Control Chile S.A. Unistrut Chile Comercial E. Industrial Limitada COLUMBIA: AMP de Colombia ltda. Kendall Columbia, S.A. Raychem Colombia S.A. Raychem S.A. COSTA RICA: Carlisle Costa Rica S.A. Kendall Innovadores en Cuidados al Paciente S.A. CROATIA: AMP Croatoa, d.o.c CYPRUS: Raychem Technologies Limited CZECH REPUBLIC: AMP Czech s.r.o. Raychem s.r.o. Wormald CZ s.r.o. Zettler C.R. Spol. s.r.o. Zettler CR, Ltd. DENMARK: AMP Danmark CIPE Holding ApS K.S. Kaalund A/S International KBIL 38 nr. 2201 ApS Raychem A/S TSD Tyco Holding I Aps Tyco Holding II Aps Tyco Holding III Aps Tyco Holding IV Aps Tyco Holding IX (Denmark) ApS Tyco Holding V Aps Tyco Holding VI Aps Tyco Holding VII Aps Tyco Holding VIII (Denmark) ApS Tyco Holding X (Denmark) ApS Tyco Holding XI (Denmark) ApS Tyco Holding XII (Denmark) ApS WATER Holding ApS Wormald A/S ECUADOR: Grinnell Sistemas de Proteccion Contra Incedio, S.A. EGYPT Raychem Egypt Limited ESTONIA: AMP Eesti AS FINLAND: AMP Finland OY TSA Gap Prive Raychem OY FRANCE: Acheroise de Participations Acroba S.A. ADT Provider ADT Provider SA ADT Securite Services S.A. Alstom Vannes SA Alte AMP--SIMEL SA AMP de France S.A. AMP Export S.A.R.L. AMP Holding France S.A.S. APM SARL ASE Continuing Education Center S.A. ASE Partners S.A. Automatisation et Securite de L'Quest (A.S.O.) Auto Suture Europe S.A. Auto Suture European Services Center, S.A. Auto Suture France S.A. Bayard CEDI Fabrication CEDI Securite SA Ceditel SA CEDP CEMOS S.A. CEPA CIPE France S.A. COFILION Cormerais Electronique S.A. CPS Alarme CPS Surveillance D.S.I. Sarl (34%) Descote SA Euroville France FAB ELEC Fibaly FINASUR Fingerkey S.A. FIRENT First Alarme Gachot S.C.A. GMC SARL Graphic Controls France S.A.R.L. Grinnell Distribution France Sarl Gubri Inbrand France SA Karner-Batts SARL Kendall Incontinence KLEIN Label S.A. Laborotoires Sherwood, Davis & Geck Mather & Platt Wormald S.A. Nomos SA Omnium de Prevention et de Protection Incendie PREFI Protel Raychem SA S.T.M.T. (s.a.r.l.) Sarthe Mayenne Telesurveillance Electronique Sayag Electronique International (S.E.I.) SCI Alain Martin Sci Becaro Sci Chanle Sci Du Mouzon Sci Mazal Sci Tov Securifin SEGE SA Sherwood, Davis and Geck Needles S.A. Societe de Communication et Telesurveillance (S.C.T.) Societe Europeenne de Protection Contre L'Incendie S.A. STPE Surgical Dynamics Europe, SAS Swair TSA Gap (34%) T.S.M.C. T.S. France SA Telesix TEP France SA Tyco Europe S.A. Tyco European Security Holdings SA Tyco European Security Management Tyco Flow Control Holding S.A. Tyco Submarine Systems SARL Visagest Sarl GERMANY: 1994 CIPE Duetschland 1996 WHICH Deutschland 1997 TEP Deutschland 1998 JALEX ADT Security Deutschland GmbH AMP Deutschland GmbH B. Braun-Dexon GmbH (50%) CDK Holding Deutschland Chemat GmbH Armaturen fur Industrie Chemat Verwaltungsgesellschaft GmbH Chemische Fabrik Pirna-Copitz GmbH Descote GmbH Elo TouchSystems Verwaltungs GmbH Elo Touch Systems GmbH & Co. KG Erika-Stiftung e.V. Grinnell Flow Control GmbH & Co. Dist. Grinnell Flow Control GmbH H&H Med. GmbH Helmut Geissler Glasinstrumente GmbH Karner-Batts GmbH Kendall-Medizinische Erzeugnise Keystone GmbH Medolas Gesellschaft Fur Medizintechnik MBH NARVIK-Yarway GmbH Ofa Bamberg Otto Fankhanel & Sohn GmbH Rathgeber BIOFORM GmbH Raumschutzanlagenbau GmbH Raychem GmbH SABO-Armaturen Service GmbH Sempell Aktiengesellschaft Sempell Armaturen-Service GmbH SHG-Strahlenchemie Holding GmbH SHG-Vermogensverwaltungsgesellschaft mbH Sigmaform GmbH TEPG GmbH Thorn Sicherheits GmbH Total Walther Feuerschutz Loschmittel GmbH Total Walther GmbH Triangle Controls Ltd. Tyco Healthcare Deutschland GmbH Tyco Healthcare Deutschland Manufacturing GmbH \ Tyco Holding GmbH Tyco International Armaturen Holding GmbH USSC Medical GmbH USSC (Deutschland) GmbH Walter Rose GmbH Wellcom International Sales and Services GmbH Wellcom International Sales and Services GmbH & Co. Betriebs KG Zettler Hilfe e.V. GIBRALTAR: Espion (International) Limited Silver Avenue Holdings Limited Stralen Investments Limited Valera Holdings Limited Velum 1998 Limited Verdana Holdings Limited GREECE: ADT Greece S.A. (82.5%) AMP Hellas MEPE Greene Insurance Limited Raychem Hellas E.P.E. Tyco Hellas S.A. GUATEMALA: ADT Sistemas de Seguridad, S.A. Grinnell Sistemas de Proteccion Contra Incendio, S.A. de C.V. Tyco Ingenieria y Construccion S.A. HONDURAS: A&E Hangers S.A. HONG KONG: A&E Products (Far East) Limited AMP Products Pacific Limited Batts Far East Limited Central Spraysafe Company (Hong Kong) Limited Crown Nation International Limited Dawson Engineering Limited (50%) Madison Cable Asia Limited ODG Energy Controls Limited Pioneer Faith International Limited (50%) Raychem (HK) Limited Raychem Asia Pacific Limited Raychem China Limited Raychem China Marketing Services Limited Sherwood Medical (Hong Kong) Limited Thorn Security (Hong Kong) Limited Tyco Engineering & Construction (HK) Ltd. Tyco Flow Control Hong Kong Limited Tyco Healthcare (HK) Co., Ltd. Tyco/Tudawe Trading Corporation Wormald Engineering Ltd. Wormald Engineering Services Limited HUNGARY: AMP Hungary Maufacturing Co. Ltd. AMP Hungary Trading Co. Ltd. Total Walther Contractor and Engineering INDIA: A&E India Private Limited AMP India Limited AMP Tools (India) Pvt. Ltd. Automotive Wiring Systems Private Limited Keystone India pvt. Limited Keystone Valves (India) Pvt. Ltd. Modern Alarms & Electronics Pvt Ltd. Raychem RPG Limited Stenco Engineering Co. Pvt. Ltd. INDONESIA: P.T. ODG Wormald Indonesia IRELAND: ABA Electronics Ltd. ACE Alarm Systems Limited ADT Limited Allied Alarms & Safes Limited Allied Alarms Limited Allied Metal Products Limited Allied Security Products Limited AMP Ireland Limited AMP Reinsurance Company Limited (ARCL) B & E Electronics Limited Brangate Limited Huet Security Ltd. IAMASCO Plc Knightline Ltd. Knightlock Ltd. Knightvision Ltd. Knightwatch Alarms, Ltd. Mather & Platt (Ireland) Limited Mather & Platt Ireland (Mfg.) Limited Mid-Ulster Alarms Limited Modern Security Systems Ltd. Renalarms Ltd. Sherwood Medical Industries of ireland Limited Tyco Far East Asia Holdings Tyco International Finance Ireland Tyco Ireland Limited United States Surgical Corporation (Ireland) Limited ISRAEL: AMP Israel Products Ltd. Sintram Limited Raychem Limited ITALY: AMP Italia Products S.p.A. AMP Italia S.p.A. Auto Suture Italia, S.p.A. Belgicast Srl Biffi Italia S.r.l. Faro S.r.l. Fasani Karner-Batts SRL Kendall Medical S.R.L. Meditec s.r.l. Politermica Distribution S.r.l. Raimondi Valvole Raychem S.p.A. Vanessa S.r.l. Wormald Italiana S.P.A. Zettler App. Eletricci S.p.A. Zettler S.R.L. JAPAN: AMP (Japan) Limited AMP Technology Japan Ltd. Ansul-Nissho, Inc. Auto Suture Japan Inc. Business Japan Co., Ltd. Central Sprinkler Japan, Limited Nihon Elcon K.K. Nippon Keystone Corporation Nippon Sherwood Medical Industries Ltd. Surgical Dynamics Japan Inc. Tyco Healthcare Products (Japan) Co., Ltd. Touch Panel Systems K.K. KOREA: AMP Korea AMP Korea Limited Auto Suture Korea, Inc. Batts Korea Ltd. Caps Co. Ltd. Dong Bang Electronic Industrial Co. Ltd. (98.5%) Kendall Medical Ltd. Keystone Valve (Korea) Limited Raychem Korea Ltd. LUXEMBOURG: 1997 CIPE Luxembourg ADT Finance S.A. ADT Luxembourg S.A. Ocarina S.A. Tyco Group S.a.r.l. Tyco International Group S.A. Valera Holdings S.a.r.l. MALAYSIA: ADT Alarm Research (M) Sdn. Bhd. AMP Connectors (Malaysia) Sdn. Bhd. AMP Products (Malaysia) Sdn. Bhd. Brunsfield Holdings Sdn. Bhd. Brunsfield Thorn Technology Sdn. Bhd. (50%) Grinnell Supply Sales (Malaysia) Sdn. Bhd. (50%) Innodouble (M) Sdn. Bhd. (51%) Keystone Valve (M) Sdn. Bhd. Kijang Merger Sdn Bhd Kumpulan Injap Kebesan (M) Sdn. Bhd. Mediquip Sdn. Bhd. Raychem Sdn. Bhd. Thorn Security Services (Malaysia) Sdn. Bhd. (30%) Tyco Engineering & Construction (Malaysia) Sdn. Bhd. (70%) Tyco Flow Control (Malaysia) Sdn. Bhd. Tyco Grinnell KM Sdn. Bhd. (30%) MARSHALL ISLANDS: C.S. Tyco Provider, Inc. Coastal Cable Ship Co. Inc. MAURITIUS: Tyco Asia Investments Limited MEXICO: ADT Security Services, S.A. de C.V. AMP Amermex, S.A. de C.V. AMP De Mexico, S.A. Ansul Mexico, S.A. de C.V. Batts de Mexico S.A. de C.V. Carlisle Recycling de Mexico S.A. de C.V. Cima de Acuna S.A. de C.V. Especialidades Medicas Kenmex, S.A. Euro-Flex de Mexico, S.A. de C.V. Grinnell Sistemas de Proteccion Contra Incendio Mexico S.A. de C.V. Kelsar S.A. de C.V. Kendall de Mexico S.A. de C.V. Kenmex Holding Company, S.A. de C.V. Plasticos Bajacal, S.A. de C.V. Plasticos Mexical S.A. de C.V. Productos de Atencion de Salud de Mexico, S.A. Raychm Juarez, S.A. de C.V. Raychem Servicos, S.A. de C.V. Raychem Technologias, S.A. de C.V. Rust Servicios Ambientales E Infraestructura, S.A. de C.V. Tyco Engineering and Construction S.A. De C.V. Tyco Submarine Systems, S.A. de C.V. Valvulas Keystone de Mexico S.A. de C.V. NETHERLANDS: 1994 CIPE Nederland 1997 TEP Nederland ADT Canada B.V. ADT Canada Holdings B.V. ADT Finance N.V. ADT Holdings B.V. ADT Security Services B.V. ADT Security Services Holdings B.V. AMP Automative Development Centre B.V. AMP Holland B.V. AMP Laminates B.V. AMP Taiwan B.V. AMP Technology Europe B.V. AMP Plus B.V. AMP Trading B.V. Ampliversal B.V. CIPE Nederland B.V. DE20 N.V. Grinnell Sales & Distribution B.V. Hovap Beheer B.V. Hovap Consolidated B.V. Hovap Holding B.V. Hovap International (Holland) B.V. Inbrand Benelux B.V. Kendall Nederland B.V. Keystone Valve (Europa) B.V. M/A-COM Eurotec B.V. MDC Meldkamer B.V. Narvik-Yarway B.V. Nieuwkerk BV Pompenfabriek "Anema" B.V. Pritchard Services Group BV Raychem (Nederland) BV Sherwood Medical Nederland B.V. TEP Security B.V. Thorn Security Nederland BV Total Walther B.V. TVM Europe B.V. Tyco Healthcare Nederland BV Tyco Labs Holland I B.V. Tyco Waterworks B.V. Unirax B.V. Unistrut (Benelux) B.V. Vonk Chokes B.V. Walther Brandbeveiliging B.V. Wormald B.V. Zettler Netherlands N.V. NEW ZEALAND: A.F.A. Monitoring Limited ADT Holding Co. No. 3 Limited ADT Holdings Co. No. 1 Limited ADT Holdings Co. No. 2 Limited Armourguard Security Limited Command Nominees Limited Danks Bros. Limited Enlist Consulting Limited Fire Protection Inspection Services Ltd. Holyhead Holdings Limited Key Contact Limited Keystone New Zealand Limited New Zealand AMP Limited New Zealand Valve Company Limited Nortrac Engineering Limited Raychem New Zealand Rhino Security Securacopy Services (1992) Limited Seekers Communications Limited Tyco Healthcare Limited Tyco New Zealand Limited NORWAY: AMP Norge AS Ergoform AS Wormald International A/S Wormald Signalco A/S PANAMA: Kendall, S.A. (Panama) Tyco Submarine Systems S.A. PEOPLE'S REPUBLIC OF CHINA: AMP (China) Investment Co. Ltd. AMP Qingdao Connector Co. Ltd. AMP Shanghai, Ltd. (92.31%) AMP Shunde Connector Limited AMP Suzhou Connector Tool, Ltd. AMP Tradinng (Shanghai) Company Limited Beijing Keystone Valve Co. Ltd. Kendall-Yantai Medical Products Company, Ltd. Keystone (Jingmen) Valve Co. Ltd. (80%) Keystone Valve (China) Ltd. Raychem (Shanghai) Trading Ltd. Raychem Electronics (Shanghai) Limited Raychem Electronics (Shenzhen) Company Limited Raychem Shanghai Cable Accessories Ltd. Shenyang OYT-Grinnell Fire Door Manufacturing Company Limited Shenyang Yarway Valve Co. Ltd. Spraysafe Beijing Tak Cheong (Yau Kee) Engineering Ltd. Tyco Electronics H.K. Limited PERU: Grinnell Sistemas de Proteccion contra Incendio S.A. Raychem Del Peru S.A. PHILIPPINES: AMP Philippines Inc. Carlisle Philippines, Inc. Tyco-PIECO Corporation, Inc. POLAND: AMP Polska sp.z.o.o. Auto Suture Poland Sp.z.o.o. Raychem Polska Sp.z.o.o. Total Walther-Ochrona P. Poz i Bezpieczenstwo Sp. z.o.o. PORTUGAL: AMP Portugal--Conectores Electricos E Electronicos LDA B. Braun-Dexon (Portugal) Produtos Hospitalares Ltda. (50%) Karner-Batts, Lda. Raychem (Portugal) Productos Quimicos Limitada REPUBLIC OF SLOVENIA: AMP d.o.o. Total Walther--Stabilne hasiace zariadenia s.r.o. RUSSIA: Auto Suture Surgical Instruments RATNERGO (ZAO RAYENERGO) SAUDI ARABIA: Abahsain-Cope, S.A. Ltd. (49%) Raychem Saudi Arabia SCOTLAND: Auto Auctions (Scotland) Limited Madison Cable Limited Modern Alarms (Scotland) Ltd. Motor Auctions (Scotland) Limited, The Security Centres (Scotland) Ltd. SINGAPORE: ACSYS Asia Pacific Pte. Ltd. AMP Manufacturing Singapore Pte, Ltd. AMP Singapore Pte. Ltd. Central Spraysafe Company PTE Limited Crosby Valve Pte Ltd Descote Asia Grinnell Supply Sales Asia Pte.Ltd. INBRAND Asia Pte.Ltd. (40%) Kendall Medical Far East Pte. Ltd. Keystone Southeast Asia Pte Ltd Raychem Singapore Pte. Ltd. Thorn Security Pte. Limited Tyco Engineering and Construction (SEA) Pte. Ltd. Tyco Flow Control Asia Inc. Tyco Flow Control Pte. Ltd. Tyco Laboratories International (1993) Pte. Ltd. Tyco Submarine Systems (S) PTE LTD SOUTH AFRICA: A&E Products Africa (Proprietary) Limited AMP Products South Africa (Proprietary) Limited Belgicast South Africa Pty. Ltd. Czechtech Intervalve (Pty) Ltd. Kendall Company of South Africa (Proprietary) Limited, The Kendall Medical (Pty) Ltd. Raychem (South Africa) (Pty) Limited Transcast (Proprietary) Limited SPAIN: 1990 CIPE Espana ADT Espana S.L. AMP Espanola, S.A. Auto Suture Espana, S.A. Automated Security International, S.A. B. Braun-Dexon Surgical S.A. (50%) Belgicast International S.L. Controles Graphicos Ibericos, S.A. Kendall Espana S.A. Kendall Proclinics, S.L. Mondragon Telecommunications SL Raychem SA Raychem Telco S.A. Segurmatica, S.A. Telecomunicaciones Marinas, S.A. Wormald Mather & Platt Espana, S.A.(5) SRI LANKA: A&E Products Lanka (PVT) Ltd SWEDEN: AMP Svenska AB Erichs Armatur AB Karner-Batts AB Kendall Medical AB Modern Prefabspecialisten Sprinkler i Lammhult Aktiebolag Prefabspecialisten Sprinkler i Lammhult Aktiebolag Raychem AG/Raychem SA Raychem Aktiegolag Thorin & Thorin AB Wormald Fire Systems A.B. SWITZERLAND: 1990 CIPE Suisse 1996 WHICH Suisse 19997 TEP Suisse ADT Franchising AG ADT Monitoring Services AG ADT Services AG AMP (Schweiz) AG AMP (Schweiz) HFI, AG AMP (Schweiz) Produktions AG Auto Suture (Schweiz) AG CIPE (Suisse) SA Confab Services AG Decolletage SA St. Maurice Neotecha A.G. Raychem A/S Robatal SA Sherwood Services AG Sirat SA Total Walther Feurschutz A.G. Tyco Acquisition AG Tyco Alpha Services AG Tyco Beta Services AG Tyco Electronics Group AG Tyco Electronics Services AG Tyco Flow Services AG Tyco Healthcare Group AG Tyco Healthcare Schweiz AG Tyco International Holding AG Tyco International Services AG Tyco Patents and Trademarks Services AG Tyco Plastics Services AG USSC AG WHICH (Suisse) SA Zettler AG TAIWAN A&E Taiwan Co. Ltd. AMP Manufacturing Taiwan Ltd. Carlisle Taiwan, Inc. Kendall Medical Ltd. Keystone Valve (Taiwan) Ltd. Raychem Pacific Corporation Raychem Taiwan Limited Taliq Taiwan Limited Wormald Engineering Systems Taiwan Ltd. THAILAND: ACS Asia (1996) Ltd. AMP (Thailand) Limited Kendall Gammtron Limited (85%) Kendall Medical Ltd. Keystone Valve (Thailand) Co., Ltd. Raychem Thai Limited TEAC Services Limited Tyco Earth Tech (Thailand) Limited Tyco International (Thailand) Ltd. (50%) WHC Holdings Limited TURKEY: AMP Turkey Karner-Batts Turkey Raychem Elektro Yalitium Sistemieri Limited Sirketi UNITED KINGDOM: Abbey Security International Ltd. Abbey Security Management Ltd. Access Control Syatems Limited ADT (UK) Holdings plc ADT UK Investments Limited ADT (UK) Limited ADT Aviation Limited ADT Finance plc ADT Fire & Security plc ADT Group plc ADT Linen Services Limited ADT Pension Fund Limited ADT Securities Limited ADT Security Systems Limited ADT Travel Holdings Limited ADT Travel Limited ADT Trustees Limited Advanced Absorbent Products Ltd. Advanced Alarm Systems Limited American District Telegraph Services International Ltd. AMP Finance Limited AMP of Great Britain Limited Ansell Jones Limited Applied Maintenance Systems Limited A.R.C. Fire Protection Ltd. Argus Group plc Ariel Burglary and Fire Protection Company Ltd. Argyle Medical Industries (U.K.) Limited AS (Overseas) Ltd. Ash Capital Finance (Jersey) Ash Group Services Ltd. Ash Rentals Ltd. Atlas Fire Engineering Limited Audio Education Limited Auto Auctions Limited Auto Sec. Info. Sys. Tech. Ltd. Auto Suture U.K. Limited Automated Loss Prevention Systems International Ltd. Automated Loss Prevention Center Ltd. Automated Security (Equipment) Ltd. Automated Security (Holdings) Inc. Automated Security (Holdings) plc Automated Security (Int) Ltd. Automated Security (Properties) Ltd. Automated Security Investments Ltd. Automated Security Limited Avalon Emergency Systems Limited BCA (Auctions) Limited BCA (Mobile Homes) Limited BCA Sports Management Limited BCA Vehicle Preparation Limited Basingkirk Estates Limited Bedford Car Auctions Limited Bissell Healthcare Limited Britannia Access Systems Limited Britannia Monitring Services Limited Britannia Photovision Limited Britannia Security CI Limited Britannia Security Group Limited Britannia Security Systems (Midlands) Ltd. Britannia Security Systems (Southern) Ltd. Britannia Security Systems Limited British Car Auctions (Aviation) Limited British Car Auctions (Flying) Limited Brook Security Services Limited Camp Limited Camp Pension Trustees Limited Campeire Limited Capital Alarms Limited Central Spraysafe Company Limited Charles Winn (Valves) Limited Cheshire Alarm Services Ltd. Chiltern Security Limited Cleaners (South West) Limited Cleaners Limited Coin Machine Sales Limited Combat Alarms Ltd. Comforta Healthcare Ltd. Communication & Tracking Services Ltd. Constabls Alarm Co. Ltd. Countrywide Leisure Holdings Limited D.C.S. Alarms Limited D J Security Alarms (Wales) Limited D J Security Alarms Limited Descote Ltd. Dicerule Limited Discreet Disposables Ltd. Donald Campbell Associates Ltd. Dong Bang Minerva (UK) Limited Ductile Steel Processors Limited Earth Tech Engineering Limited Edward Barber & Company Limited Edward Barber (UK) Limited Ellis Son & Paramore Limited Emos Information Systems Limited Emos Rentals Limited Eyelevel Electronics Limited Exbury Limited Excelsior Security Services Limited Farnham Limited Finesnatch Limited Fire Defender (UK) Ltd. (50%) Ford Electronic Services Ltd. Frome Motor Auction Sales Limited Gailey Caravan and Leisure Limited Gardner Security Grinnell (UK) Ltd.(6) Grinnell Manufacturing (UK) Limited Grinnell Sales & Distribution (UK) Ltd. Group Sonitrol Security Systems Ltd. Hertfordshire Security Systems Limited Hindle Cockburns Limited HMC Factors Limited Home Improvement Holdings Limited Huddersfield Motor Auctions Limited Hygieia Healthcare Holdings Ltd. INBRAND Ltd. INBRAND UK Ltd. Industrial Cleaners (UK) Limited Integrated (Fire & Safety) Services Limited Integrated Transport Systems Limited (10%) Itoba Limited James Deacon Security Limited JEL Building Management Limited JEL Building Management Systems Limited JMC Rehab Limited Johnson and Sons Limited Kaldistone Limited Karner-Batts, Ltd. Keystone Valve (UK) Limited Labyrinth Investments Limited Lander Urban Renewal Ltd. Lesters Health Care Services Libas International Limited Linksview Limited M1 Car Auctions Limited M1 Motor Auctions Limited M3 Car Auctions Limited M25 Motor Auctions Limited Macron Fireater Limited Maidstone Fire Protection Markden No. 1 Limited Markden No. 2 Limited Markden No. 3 Limited Markden No. 4 Limited Markden No. 5 Limited Markden No. 6 Limited Markden No. 7 Limited Mather & Platt (Exports) Ltd. Mather & Platt Alarms Limited Mather & Platt Fire Protection Limited Measham Motor Auctions Limited Midland Counties Motor Auctions Limited Minerva Fire Defense Limited Mobile Pressure Cleaning Limited Modern Alarms Ltd. Modern Automated Security Ltd. Modern Automatic Alarms (NI) Ltd. Modern Automatic Alarms Ltd. Modern Carecell Ltd. Modern Homepack Ltd. Modern Integrated Systems Ltd. Modern Security Systems Modern Security Systems (IOM) Ltd. Modern Security Systems (Products) Ltd. Modern Telecom Ltd. Modern Telecom Security Ltd. Motor Auctions (London) Limited, The Newman Tubes Limited OCTY2 OCTY 1 ODL Limited OKD Limited OMK Limited PPR Alarms Limited Paul Fabrications Limited Priory Security Services Limited Pritchard Insurance Services Limited Pritchard Laundries Limited Pritchard Services Group BV Pritchard Services Group Investments Limited Progressive Securities Investments Limited Prospect Cleaning Supplies Limited Prospect House Investments Limited Prospect House No. 11 Limited Prospect House No. 5 Limited Prospect House No. 7 Limited Provincal Limited Pryor & Howard (1998) Limited Raychem Limited Raynet (UK) Limited Realm Electronics Limited Redhill Security Services Llimited Region Protection (Notts) Limited S&W Bedrooms Limited Safeguard Electronics Limited Saffire Alarm Systems Limited Saffire Extinguishers Limited Screentone Limited Secure-It (UK) Limited Securis Products Ltd. Securitag International Ltd. Security Alarms Ltd. Security Centres (UK) Holdings Ltd. Security Centres (UK) Limited Security Centres Holdings Intl. Ltd. Security Centres Investments Ltd. Security Systems (Rental) Limited Security Watch Limited Shepton Holdings Limited (UK) Shield Protection Limited Show Contracts Limited Sigmaform UK Limited Sky Signs Limited Snap Printing Limited Soverign Security Systems Limited Spensall Engineering Limited Splenser Cleaning Services Limited Spraysafe Automatic Sprinklers Limited Stapp Limited Steel Support Systems Steelway Fensecure Limited Steeplock Limited Streets Machine Operating Company Stretford Security Services, Ltd. Taskman Security Services Limited Telecom Security Ltd. Ten Acre Securitites Ltd. Thameside Lock and Safe Company Limited The British Security Consurtium Ltd. Thorn Security Group Limited Thorn Security International Limited Thorn Security Limited Thornfire Limited Tinwald Limited Tower Manufacturing Limited TSG Trustees Limited TVC Distribution Limited TVM Group UK Tyco European Metal Framing Limited Tyco European Steel Strip Limited Tyco European Tubing Limited Tyco Flow Control (UK) Limited Tyco Healthcare UK Limited Tyco Holdings (UK) Ltd. Tyco Tech Limited Tyco Valves Limited Unifast Systems Limited Unipower Limited Unirax Limited Unistrut Europe Limited Unistrut Holdings Ltd. Unistrut Limited Vernon-Carus Limited WM Fire Protection Limited Wormald Ansul (UK) Ltd.(7) Wormald Fire Systems Ltd. Wormald Holdings (UK) Ltd. Wormald Industrial Property Ltd. UNITED STATES OF AMERICA: A&E Construction Products, Inc. A&E GP Holding, Inc. A&E Hangers, Inc. A&E Products Group LP A&E Products Group, Inc. A-G Holding, Inc. I A-G Safety Services, Inc. AA Property Holdings, Inc. AAAA Dealer Services, Inc. Adhesive Technologies, Inc. ADT Automotive Holdings, Inc. ADT Automotive Paintless Dent Repair, Inc. ADT Automotive Services, Inc. ADT Automotive, Inc. ADT General Holdings, Inc. ADT Holdings, Inc. ADT Investments II, Inc. ADT Investments, Inc. ADT Maintenance Services, Inc. ADT Operations, Inc. ADT Property Holdings, Inc. ADT Security Services, Inc. ADT Security Systems, West, Inc ADT Services, Inc. ADT Specialty Auctions, Inc. ADT Title Holding Company I ADT Title Holding Company II ADT Travel Group Limited Advanced Quick Circuits, L.P. Advanced Services Corporation AEPG, Inc. Alarmguard, Inc. Alarmtech, Inc. Allied Tube & Conduit Corporation AMP Building Technology, Inc. AMP China Incorporated AMP International Enterprises Limited AMP Investments, Inc. AMP Products Corporation AMP Services, Ltd. AMP Technologies, Inc. Anderson, Greenwood & Co. Anderson, Greenwood LP Ansul, Incorporated(8) API Security, Inc. APS Group Holding, Inc. AQC, Inc. ARR, Inc. ATC Sales Company Atcor, Inc. Auction Transport, Inc. Auto Suture Company, Australia Auto Suture Company, Canada Auto Suture Company, Netherlands Auto Suture Company, U.K. Auto Suture Eastern Europe, Inc. Auto Suture Europe Holdings, Inc. Auto Suture International, Inc. Auto Suture Norden Co. Auto Suture Puerto Rico, Inc. Auto Suture Russia, Inc. Automated Security Corp. Automated Security Holdings, Inc. Babcock Water Engineering LP Batts, Inc. Beta Acquisition Corp. British Car Auction, Inc. Building Technology Associates Burton, Adams, Kemp & King, Inc. C.S. Charles L. Brown, L.P. (75%) C.S. Global Link, L.P. (75%) C.S. Global Mariner, L.P. (75%) C.S. Global Sentinel, L.P. (75%) C.S. Long Lines, L.P. (75%) Carlisle Plastics Holding LLC Carlisle Plastics LP Carroll Touch International Ltd. CASS Water Engineering, Inc. CCTC International, Inc. Central Castings Corporation Central CPVC Corporation Central Sprinkler Company Central Sprinkler Corporation Chemegene Corporation Confab Holding Corp. Confab International L.P. Connectware, LLC. Crosby GP Holding, Inc. Crosby Holding, Inc. I Crosby Valve International Ltd. Crosby Valve Sales & Services Corporation Crosby Valve, Inc. CSC Finance Company CSC Investment Company CVG Holding Corp. Descote, Inc. Detect, Inc. Dexide, Inc. E.C. Technologies, Inc. Earth Tech Water Engineering LP Earth Tech Architecture Inc. Earth Tech Engineers of New York, P.C. Earth Tech Environment & Infrastructure Inc. Earth Tech Holdings, Inc. Earth Tech of New York Inc. Earth Tech of North Carolina, Inc. Earth Tech of Ohio Inc. Earth Tech WE Holding Inc. Earth Tech, Inc. Earth Technology Corporation (USA), The Electro Signal Lab, Inc. Elkay Services LLC Elo Touch Systems FCI Liquidations, Inc. Fire Quip Corporation Fire Services, Inc. Firth Cleveland Steels, Inc. Flying Lion, Inc. Forever Hangers, Inc. FRM Services, Inc. GC Holding, Inc. I GC Holdings, Inc. General Acquisition Corp. General Sub Acquisition Corp. Georgia Packaging, Inc. Gimpel Corporation Graphic Controls Corporation Graphic Holdings, Inc. Grinnell Corporation(9) J.B. & S. Lees Inc. J.P. Multi-Systems, Inc. J.R. Clarkson Company, The Kendall Holding Company Keystone France Holdings Corp. Keystone Holdings Corp. Keystone Kuwait, Inc. Keystone Middle East, Inc. Keystone Saudi, Inc. Keystone Valve-Middle East, Inc. Ludlow Canada, Inc. Ludlow Company LP, The(10) Ludlow Corporation Ludlow Jute Company Limited M/A-COM (AMP) Puerto Rico, Inc. M/A-COM Food Share, Inc. M/A-COM Foundation, The Madison Cable Corporation Management Association of M/A-COM, Inc., The Mid-Atlantic Security, Inc. Midland Automatic Sprinkler Co. MIH, Inc. Mobile Security Communications, Inc. (19%) Montclair Molding, Inc. Mueller Co. Mueller Holdings Corp. National Integration Services National Tape Corporation New England Fire Equipment Company, Inc. Newton Specialty Glass, Inc. Nobel Electronics, Inc. On Q Systems, Inc. Palomar Precision Tubes, Inc. Pasadena Fire & Safety Inc. Phoenix Security Services Limited Photovision Rentals Limited Polyken Technologies Europe, Inc. Precision Interconnect, Inc. Primary Display Corporations Private Products, Inc. Quantum Instrument Corporation Raychem (Delaware) Ltd. Raychem Asia Pacific Management Services, Inc. Raychem Colombia, Inc. (CA) Raychem Colombia, Inc (DE) Raychem Corp. of Arizona Raychem Foundation (no shareholders) Raychem Gulf Coast, Inc. Raychem International Corporation Raychem International Manufacturing Corporation Raychem Radiation Technologies, Inc. Raychem Ventures, Inc. Raychem-Essex, LLC Raythene Systems Corp. Remtek International, Inc. Remtek Sales Corp. Roe Fire & Safety Equipment Co., Inc. Robinson Alarm Companies, Inc. Robinson Protective Alarm Company Rochester Corporation, The RTP Development Rust Architecture & Geology of North Carolina, P.C. Rust Environment & Infrastructure of Michigan Inc. Rust Environment & Infrastructure, P.E., Arch. & L.S., P.C. Security Watch, Inc. Sherwood Medical Company Sherwood Medical Company Sherwood-Accurate Inc. Sigma Circuits, Inc. Sigma GP Holding, Inc. Sigma Holding Corp. Sigmaform Corporation Sigmaform International Sigmaform Pacific Sales Corp. Simplex Technologies Inc. Skyline Fire & Communications, Inc. Sonitrol Corporation Sonitrol Limited Sonitrol Management Corporation Sonitrol Southeast, Inc. SSI Atlantic Crossing Holdings LLC SSI Atlantic Crossing LLC Star Sprinkler, Inc. Sunbelt Holding, Inc. I Sunbelt Holdings, Inc. Sunbelt Manufacturing, Inc. Surgical Dynamics, Inc. Surgical Service Corporation SWD Holding, Inc. SWD Holding, Inc. I T.J. Cope Inc. T15 Acquisition Corp. TA, Inc. Techcon International Inc. Thermacon, Inc. TKC Holding Corp. TME Management Corp. TPCG Holding Transoceanic Cable Ship Company, Inc. Tri-City Auto Auction, Inc. TSSL Finance Company, Inc. TSSL Holding Corp. Tucson Special Systems, Inc. TV&C GP Holding, Inc. TVC Holding TVC, Inc. TVM Group, Inc. TVM, Inc. Tyco (US) Holdings, Inc. Tyco Acquisition Corp VII Tyco Acquisition Corp XIII Tyco Acquisition Corp. I (NV) Tyco Acquisition Corp. II Tyco Acquisition Corp. II (NV) Tyco Acquisition Corp. III Tyco Acquisition Corp. III (NV) Tyco Acquisition Corp. IV Tyco Acquisition Corp. IV (NV) Tyco Acquisition Corp. IX Tyco Acquisition Corp. V Tyco Acquisition Corp. V (NV) Tyco Acquisition Corp. VI Tyco Acquisition Corp. X Tyco Acquisition Corp. XI Tyco Acquisition Corp. XII Tyco Acquisition Corp. XIX Tyco Acquisition Corp. XV Tyco Acquisition Corp. XVI Tyco Acquisition Corp. XVIII Tyco Acquisition Corp. XXI Tyco Acquisition Corp. XXII Tyco Acquisition Corp. XXIII Tyco Adhesives GP Holding, Inc. Tyco Adhesives LP Tyco Adhesives, Inc. Tyco Electronics Corporation Tyco Finance Corp. Tyco Flow Control, Inc. Tyco Healthcare Group LP Tyco Holding Corp. Tyco Holdings of Nevada, Inc. Tyco Holdings, Inc. Tyco International (NV) Inc. Tyco International (PA) Inc. Tyco International (US) Inc. Tyco International Asia, Inc. Tyco Merger Sub (NJ) Inc. Tyco Printed Circuit Group Inc. Tyco Printed Circuit Group LP Tyco Receivables Corp. Tyco Receivables Funding LLC Tyco SPC Inc. Tyco Submarine Systems Ltd. Tyco Submarine Systems Projects, Inc. Tyco Technology Resources, Inc. Tyco Valves & Controls LP Tyco Valves & Controls, Inc. Tyco Worldwide Services, Inc. U.S. Capital Corporation U.S.S.C. Puerto Rico, Inc. Unistrut Corporation Unistrut International Corp. United States Construction Co. United States Surgical Corporation USS Acquisition Corp. USSC Acquisition Corporation USSC Cal Med, Inc. USSC Financial Services Inc. USSC Tex Med, Inc. Valleylab Holding Corporation Valleylab Inc. Varec Vapor Control, Inc. W.A.F. Group, Inc. Walter Rose Co. Water Holdings Corp. Waverly Group LLC, The Whitaker Corporation, The Wormald Americas, Inc. WGV Liquidations, Inc. Yarway Corporation URUGUAY: Bethany Trading Company Raychem Uruguay SA VENEZUELA: AMP de Venezuela, C.A. Ansul de Venezuela C.A. Grinnell Sistemas de Proteccion Contra Incendio, S.A. (Venezuela) Grupo Rust International Di Venezuela C.A. Kendall de Venezuela, C.A. Raychem de Venezuela, SA Tyco Flow Control de Venezuela, CA Tyco Submarine Systems, C.A. VIETNAM: Tyco Engineering (Vietnam) Ltd. Tyco-PIECO Corporation (80%) - ------------------------ 1 Also doing business as GAAM Fire and Rescue 2 Also doing business as Fire Guard A.F.S., Grinnell ACT, Grinnell Controlled Atmospheres, Grinnell Flow Control, Jefferson Electrical Services, O(1)Donnell Griffin, Planned Communications Australia, WF Energy Controls 3 Also doing business as ACT Plumbing Maintenance, Advanced Systems Engineering, Building Asset Maintenance, EPS Electrical Plumbing Services, Fire Control Services, FHD Airconditioning, Goldfields Fire Services, Masterbilt Industries, Olsen Engineering Company, Quintrix Communications, Safeguard Fire Systems, Simplex Fire Protection Company, Tyco Fire Monitoring, Viking Fire Sprinklers, Williams Extinguisher Service, Wormald Advanced Systems Engineering, Wormald Building Products, Wormald Control Systems, Wormald Electronics, Wormald Fire & Safety, Wormald Fire Engineering, Wormald Technology 4 Also doing business as Grinnell Fire Protection, Wormald Canada, Scotia Sprinklers, Wormald Fire Systems 5 Also doing business as Wormald Espania 6 Also doing business Grinnell Firekil, GEM Consultants 7 Also doing business as Wormald Fire Systems, Wormald Engineering, Wormald Britannia, Wormald Lintott and Lintott Process Systems 8 Also doing business as Ansul Fire Protection 9 Also doing business as Automatic Sprinkler, GEM Sprinkler Company, Grinnell Flow Control, Grinnell Fire Protection, Tyco Fire & Security Services and Zettler 10 Also doing business as Kendall Healthcare Products and Kendall International