Exhibit 3.150
                                  FORM B C A-47

       BEFORE ATTEMPTING TO EXECUTE THESE BLANKS BE SURE TO READ CAREFULLY
                      THE INSTRUCTIONS ON THE BACK THEREOF.

                   (THESE ARTICLES MUST BE FILED IN DUPLICATE)

STATE OF ILLINOIS,
                                    ss.
LAKE COUNTY

TO Alan J. Dixon, Secretary of State

THE UNDERSIGNED,



    Name       Number      Street       Address City   State
- -------------  ------  ---------------  ------------  --------
                                          
Tom E. Krause   127    Woodlawn Drive,  Mundelein,    Illinois
Nancy Krause    127    Woodlawn Drive,  Mundelein,    Illinois


being one or more natural  persons of the age of  twenty-one  years or more or a
corporation,  and having subscribed to shares of the corporation to be organized
pursuant  hereto,  for the purpose of forming a corporation  under "The Business
Corporation  Act" of the  State of  Illinois,  do  hereby  adopt  the  following
Articles of Incorporation:

                                   ARTICLE ONE

The name of the corporation hereby incorporated is:  TEK, Inc.

                                   ARTICLE TWO

The address of its initial  registered  office in the State of Illinois  is: 175
Peterson Road Street,  in the Village of  Libertyville  60048 County of Lake and
the name of its initial Registered Agent at said address is: Tom E. Krause

                                  ARTICLE THREE

The duration of the corporation is:  Perpetual

                                  ARTICLE FOUR

The purpose or purposes for which the corporation is organized are:



     The running of an ambulance  and rescue squad  business and all  activities
     relating   thereto   including   but  not  limited  to  the  emergency  and
     non-emergency  transportation  of  people  via  ambulance  or  other  motor
     vehicle. The corporation will not engage in the practice of medicine.

                                  ARTICLE FIVE

PARAGRAPH 1: The aggregate  number of shares which the corporation is authorized
to issue is 1,000,  divided into one (1) classes. The designation of each class,
the number of shares of each class,  and the par value, if any, of the shares of
each class,  or a statement  that the shares of any class are without par value,
are as follows:

           Series      Number of    Par value per share or statement that shares
Class      (If any)    Shares       are without par value

Common                 1,000        No Par Value

PARAGRAPH 2: The preferences, qualifications,  limitations, restrictions and the
special or relative rights in respect of the shares of each class are:

NONE

                                   ARTICLE SIX

     The class and  number of shares  which the  corporation  proposes  to issue
without  further  report  to the  Secretary  of  State,  and  the  consideration
(expressed in dollars) to be received by the corporation therefor, are:

                                                Total consideration to be
Class of shares         Number of shares        received therefor:

Common                  1,000                   $ 10, 000.00

                                  ARTICLE SEVEN

     The  corporation  will not  commence  business  until at least one thousand
dollars has been received as consideration for the issuance of shares.

                                  ARTICLE EIGHT

     The  number  of  directors  to be  elected  at  the  first  meeting  of the
shareholders is: two (2)

                                  ARTICLE NINE

PARAGRAPH 1: It is  estimated  that the value of all property to be owned by the
corporation for the following year wherever located will be $10,000

                                       2


PARAGRAPH 2: It is estimated that the value of the property to be located within
the State of Illinois during the following year will be $10,000

PARAGRAPH  3: It is estimated  that the gross  amount of business  which will be
transacted by the corporation during the following year will be $140,000

PARAGRAPH  4: It is estimated  that the gross  amount of business  which will be
transacted  at or from places of  business  in the State of Illinois  during the
following year will be $140,000

     NOTE: If all the property of the corporation is to be located in this State
and all of its  business  is to be  transacted  at or from places of business in
this State, or if the  incorporators  elect to pay the initial  franchise tax on
the basis of its entire stated capital and paid-in surplus, then the information
called for in Article Nine need not be stated.

/s/ Tom E. Krause
- --------------------------
Tom E. Krause

/s/ Nancy M. Krause
- --------------------------
Nancy M. Krause

Incorporators Signatures

     NOTE: There may be one or more  incorporators.  Each incorporator  shall be
either a  corporation,  domestic or foreign,  or a natural  person of the age of
twenty-one years or more. If a corporation acts as incorporator, the name of the
corporation and state of incorporation  shall be shown and the execution must be
by its President or  Vice-President  and verified by him, and the corporate seal
shall be affixed and attested by its Secretary or an Assistant Secretary.

                             OATH AND ACKNOWLEDGMENT

STATE OF ILLINOIS
                        ss.
Lake County

I, Jayne J. Harlow,  A Notary Public,  do hereby certify that on the 23rd day of
March 1977 Tom E. Krause and Nancy M. Krause  personally  appeared before me and
being first duly sworn by me acknowledged the signing of the foregoing  document
in the respective  capacities therein set forth and declared that the statements
therein contained are true.

IN WITNESS WHEREOF,  I have hereunto set my hand and seal the day and year above
written.

                                         /s/ Jayne J. Harlow
                                         ---------------------------------------
                                         Notary Public

                                       3


BCA 1.15 (Rev. Jan. 1986)

Submit in Duplicate

Remit payment in Check or Money Order, payable to "Secretary of State".

DO NOT SEND CASH!

                                    JIM EDGAR
                               SECRETARY OF STATE
                                STATE OF ILLINOIS

                             STATEMENT OF CORRECTION

Pursuant  to the  provisions  of "The  Business  Corporation  Act of 1983",  the
undersigned corporation hereby submits the following Statement of Correction.

1.   The name of the corporation is TEK, Inc.

2.   The State or Country of incorporation is Illinois

3.   The title of the instrument to be corrected is Articles of Incorporation

4.   The instrument to be corrected was filed by the Secretary of State on March
     25, 1977.

5.   It  was  inaccurate,  erroneous  or  defective  in  the  following:  If not
     sufficient space to cover this point, add one or more sheets of this size.

     The  consideration  to be received  for the initial  issuance of shares was
     misstated.

6.   The corrected portion(s) of the above instrument, in corrected form, are as
     follows:  If not sufficient  space to cover this point, use reverse side or
     add one or more sheets of this size.

     Article 6:

                                                 Total consideration
Class of shares         Number of shares         received
- ---------------         --------------------------------------------

Common                        1,000                     1,000

     The  undersigned  corporation has caused this statement to be signed by its
duly authorized officers,  each of whom affirm, under penalties of perjury, that
the facts stated herein are true.

Dated  April 21, 1987                                 TEK, INC.
                                                 ------------------------------

                                       4


                                                 (Exact Name of Corporation)
attested by /s/ Nancy M. Krause                  by /s/ Tom E. Krause
            --------------------------           -------------------------------
(Signature of Secretary or Assistant             (Signature of President or Vice
 Secretary)                                      President)
Nancy M. Krause/Secretary                        Tom E. Krause/President
(Type or Print Name and Title)                   (Type or Print Name and Title)

                                       5


File #
Form BCA-5.10
NFP-105.10
(Rev. Jan. 1995)

George H. Ryan
Secretary of State
Department of Business Services
Springfield, IL  62756
Telephone (217) 782-3647

STATEMENT OF
CHANGE
OF REGISTERED AGENT
AND/OR REGISTERED
OFFICE

1.   CORPORATE NAME: TEK, INC.

2.   STATE OR COUNTRY OF INCORPORATION: ILLINOIS

3.   Name and  address of the  registered  agent and  registered  office as they
appear on the records of the office of the Secretary of State (before change):

Registered Agent    Tom E. Krause
                    -----------------------------------------------------
                    First Name       Middle Name            Last Name

Registered Office   4801 Prime Parakway
                    -----------------------------------------------------
                    Number  Street Suite No.(A P.O. Box alone is not acceptable)

                    McHenry 60051-1660    McHenry
                    City    Zip Code      County

4.   Name and address of the  registered  agent and  registered  office shall be
(after all changes herein reported):

Registered Agent    C T Corporation system
                    First Name       Middle Name            Last Name

Registered Office   208 S. LaSalle Street
                    Number   Street  Suite No. (A P.O. Box alone is not
                                     acceptable)

                    Chicago  60604      Cook
                    City     Zip Code   County

                                       6


(ILL. - 581 - 12/27/94)

5.   The address of the registered office and the address of the business office
of the registered agent, as changed, will be identical.

6.   The above change was authorized by: ("X" one box only)

     a.  [ ]  By resolution duly adopted by the board of directors.    (Note 5)

     b.  [ ]  By action of the registered agent.                       (Note 6)

NOTE:  When the registered  agent changes,  the signatures of both president and
secretary are required.

7.   (If  authorized  by the  board of  directors,  sign  here.  See Note 5) The
undersigned  corporation  has  caused  this  statement  to be signed by its duly
authorized officers,  each of whom affirms, under penalties of perjury, that the
facts stated herein are true.

Dated    November 30, 1995                        TEK, INK
                                           -------------------------------------
                                           (Exact Name of Corporation)

attested by /s/ Robert H. Byrne            by /s/ Robert E. Janett
            ----------------------------   -------------------------------------
           (Signature of Secretary)        (Signature of Vice President)
           Robert H. Byrne - Secretary     Robert E. Janett - Vice-President
           (Type or Print Name and Title)  (Type or Print Name and Title)

(If change of registered  office by registered agent, sign here. See Note 6) The
undersigned,  under  penalties of perjury,  affirms that the facts stated herein
are true.

Dated 12/8/95  19__                    /s/ Ann Marie Cummins
                                       -----------------------------------------
                                       (Signature of Registered Agent of Record)
                                       ANN MARIE CUMMINS
                                       ASSISTANT SECRETARY

NOTES

1.   The registered office may, but need not be the same as the principal office
of the corporation. However, the registered office and the office address of the
registered agent must be the same.

2.   The registered office must include a street or road address;  a post office
box number alone is not acceptable.

3.   A corporation cannot act as its own registered agent.

4.   If the  registered  office is changed from one county to another,  then the
corporation  must file with the  recorder of deeds of the new county a certified
copy of the articles of  incorporation  and a certified copy of the statement of
change of registered office. Such certified copies may be obtained ONLY from the
Secretary of State.

                                       7


5.   Any change of registered  agent must be by resolution  adopted by the board
of  directors.  This  statement  must  then  be  signed  by  the  president  (or
vice-president) and by the secretary (or an assistant secretary).

6.   The registered  agent may report a change of the  registered  office of the
corporation for which he or she is registered agent. When the agent reports such
a change, this statement must be signed by the registered agent.

                                       8