EXHIBIT 21 MICROTOUCH SYSTEMS, INC. SUBSIDIARIES OF THE REGISTRANT NAME JURISDICTION MicroTouch Systems, Ltd. United Kingdom of Britain MicroTouch Systems, Pty., Ltd. Australia MicroTouch Systems, KK Japan MicroTouch Systems, SARL France MicroTouch Systems, GMBH Germany MicroTouch Systems, SRL Italy MicroTouch Resistive Products, Inc. Texas, U.S.A. MicroTouch Investments, Inc. Massachusetts, U.S.A. MicroTouch FSC Saipan