
                             Exhibit 2(b)

This document is important and requires your immediate attention. 
If you are in any doubt as to how to deal with it you should
consult your investment dealer, stockbroker, bank manager, lawyer
or other professional advisor.

                    NOTICE OF CHANGE AND VARIATION
                       OF THE OFFERS TO PURCHASE

             all of the Class A Subordinate Voting Shares 
                     and all of the Class B Shares

                                  of

                            DMR GROUP INC.

                             at a price of

                     Cdn. $8.25 in cash per share

    by Amdahl Canada Acquisition Inc., a wholly owned subsidiary of

                         AMDAHL CANADA LIMITED

The Offers, as amended by this Notice of Change and Variation,
are described in the Offers to Purchase and Offering Circular of
Amdahl Canada Acquisition Inc. dated September 27, 1995 and the
Letter of Acceptance and Transmittal and Notice of Guaranteed
Delivery.

THE OFFEROR HEREBY GIVES NOTICE THAT IT IS AMENDING AND VARYING
ITS OFFERS BY WAIVING THE CONDITIONS TO THE CLASS B OFFER AND
EXTENDING THE EXPIRY TIME OF THE OFFERS.  THE OFFERS, AS AMENDED
BY THIS NOTICE OF CHANGE AND VARIATION, WILL BE OPEN FOR
ACCEPTANCE, UNLESS FURTHER EXTENDED, UNTIL 6:00 P.M., MONTREAL
TIME, ON TUESDAY, OCTOBER 31, 1995.

Questions and requests for assistance may be directed to the
Dealer Manager for the Offers, RBC Dominion Securities Inc. in
Canada and RBC Dominion Securities Corporation in the United
States, or the Depositary or the Forwarding Agent.  Additional
copies of this document, the Offers to Purchase and Offering
Circular dated September 27, 1995 and the Letter of Acceptance
and Transmittal and Notice of Guaranteed Delivery may be obtained
without charge on request from the Depositary or the Forwarding
Agent at their respective addresses shown in the Letter of
Acceptance and Transmittal.

                 The Dealer Manager for the Offers is

in Canada                       in the United States
- ---------                       --------------------
RBC Dominion Securities Inc.    RBC Dominion Securities Corporation

October 19, 1995
<PAGE>
TO:   Holders of Class A Subordinate Voting Shares and
      Class B Shares of DMR Group Inc.

      By notice to the Depositary on October 19, 1995, Amdahl
Canada Acquisition Inc. (the "Offeror") has, as set forth in this
Notice of Change and Variation, amended its Offers dated
September 27, 1995 pursuant to which the Offeror is offering to
purchase all of the Class A Shares and Class B Shares of DMR
Group Inc.

      Except as otherwise set forth in this Notice of Change and
Variation, the terms and conditions of the Offers continue to be
applicable in all respects and this Notice of Change and
Variation should be read in conjunction therewith.  Unless the
context otherwise requires, terms denoted by initial capital
letters and not otherwise defined herein have the respective
meanings set forth in the Offers.


1.    WAIVER OF CONDITIONS

      The Offeror has waived the conditions to the Class B Offer
set forth in section 6 of the Offers to Purchase.


2.    EXTENSION OF EXPIRY TIME

      The Expiry Time of the Offers, being the period during which
the Offers are open for acceptance, has been extended to 6:00
p.m., Montreal time, on Tuesday, October 31, 1995.


3.    SHARES TAKEN UP AND PAID FOR UNDER THE OFFERS

      The Depositary advised the Offeror that, as of 4:55 p.m.,
Montreal time, on the date hereof, a total of 1,670,278 Class A
Shares and 3,556,088 Class B Shares were deposited, and not
withdrawn, under the Offers, of which 1,666,300 Class A Shares
and 3,556,088 Class B Shares were deposited by the Controlling
Shareholders.  Prior to extending the Offers, the Offeror advised
the Depositary at its principal office in Montreal that the
Offeror was waiving all of the conditions to the Class B Offer
and instructed the Depositary to take up and pay for all of the
Class B Shares and Class A Shares validly deposited, and not
withdrawn, under the Offers.  Such Shares (the "Acquired Shares")
were taken up and paid for by the Offeror on the date hereof.  As
a result of taking up and paying for the Class B Shares, the
condition to the Class A Offer was satisfied.  The Offeror is now
the direct and indirect beneficial owner of 1,670,278 Class A
Shares, representing approximately 15% of the outstanding Class A
Shares, and 3,556,088 Class B Shares, representing more than 99%
of the outstanding Class B Shares.  The Acquired Shares represent
approximately 80% of the voting rights attaching to all currently
outstanding Shares so that the Offeror has now obtained the right
to control DMR.


4.    THE BDM OFFER

      On September 29, 1995, BDM Alliance Inc. ("BDM") mailed its
offer (and accompanying offering circular) to shareholders of
DMR. BDM's offer, which is subject to certain conditions, is
stated to expire on October 20, 1995, unless extended or
withdrawn.


5.    MOTION TO AND DECISION OF THE QUEBEC SUPERIOR COURT

      On October 2, 1995, Mr. Pierre Ducros and the Offeror, among
others, filed a motion (the "Principal Motion") with the Quebec
Superior Court for a declaratory judgement asking the court to:

      (a)  confirm that the Articles provide that any Class A
Shares tendered to an offer made for only the Class B Shares are
not converted into Class B Shares unless the offeror has taken up
and paid for a sufficient number of Class B Shares to five the
offeror more than 50% of the voting rights attaching to all
outstanding Shares prior to giving effect to the conversion; and

      (b)  declare that, in the present circumstances, considering
the irrevocable tender of the Controlling Shareholders' Shares to
the Offers and the notice referred to in paragraph 4 above, BDM's
offer cannot succeed.

      On October 10, 1995, in an oral judgement (subsequently
supported by written reasons signed on October 16, 1995), the
Quebec Superior Court dismissed the Principal Motion and declared
that (i) the offer by BDM constituted an offer as defined in
section 3.4.2.6 of the Articles, (ii) holders of Class A Shares
have a right to convert such shares into Class B Shares for the
purposes of participating in BDM's offer, and (iii) BDM has the
right to take up and pay for the Class B Shares tendered under
its offer (including those resulting from the conversion of Class
A Shares) so long as the number of shares deposited, and not
withdrawn, is sufficient to constitute BDM as a holder, at the
expiry of its offer, of more than 50% of the voting rights
attaching to all outstanding Shares.

      Amdahl announced on October 10, 1995 that it would appeal
the decision of the Quebec Superior Court.  On October 17, 1995,
an inscription in appeal (the "Inscription in Appeal") of the
judgement of the Quebec Superior Court was filed before the
Quebec Court of Appeal by Amdahl Canada and the Offeror.  On
October 18, 1995, the appellants filed a motion to obtain an
early hearing date before the Quebec Court of Appeal.  This
motion is scheduled to be heard by the Chief Justice of the
Quebec Court of Appeal on Monday, October 23, 1995.

      For the reasons outlined in the Inscription in Appeal, the
Offeror continues to believe that both the intent and the wording
of the Articles provide that a conversion of the Class A Shares
into Class B Shares is not permitted to occur if the Controlling
Shareholders reject an offer made only for Class B Shares.  The
Offeror believes that the right of conversion for the Class A
Shares in the Articles should be interpreted as a normal "coat
tail" provision, which permits the Class A Shares to participate
in an offer made only for the Class B Shares if, but only if, the
Controlling Shareholders who own the Class B Shares have accepted
that offer and so caused a change of control of DMR.  If the
Controlling Shareholders do not accept that offer, the Class A
Shares may not participate in it by converting into Class B
Shares.  The effect of the judgment of the Quebec Superior Court
is to grant the minority Class A Shareholders the ability to sell
control of DMR to an offer made only for the Class B Shares
without the Controlling Shareholders' consent, thereby divesting
the Controlling Shareholders of their control.  The Offeror does
not believe that this was the intention of DMR or its
shareholders when the Articles were approved.  The wording of the
Articles can and should be interpreted as providing a normal
"coat tail" agreement.


6.    THE IBM OFFER

      Following the release of the judgment of the Quebec Superior
Court, IBM  Canada Ltd. announced that it would be making an
offer for all of the Class B Shares (including Class B Shares
issued on conversion of Class A Shares) at $11.00 cash per Class
B Share.  On October 13, 1995, IBM Canada Services Corp. ("IBM"),
a wholly-owned subsidiary of IBM Canada Ltd., mailed its offer (
and accompanying offering circular) to shareholders of DMR. 
IBM's offer, which is subject to certain conditions, is stated to
expire on November 3, 1995, unless extended or withdrawn.

      IBM's offer is conditional upon, among other things, there
being validly deposited under its offer and not withdrawn 90% of
the Class B Shares outstanding upon the completion of its offer. 
The Offeror is the direct and indirect beneficial owner of a
sufficient number of Class B Shares to prevent the satisfaction
of this condition to IBM's offer.


7.    RIGHT TO WITHDRAW DEPOSITED SHARES

      Holders of Shares have the right to withdraw Deposited
Shares under the circumstances and in the manner described in
section 7 of the Offers to Purchase under "Right to Withdraw
Deposited Share".


8.    PAYMENT FOR DEPOSITED SHARES

      The Offeror will take up and pay for all Shares validly
deposited, and not withdrawn, under the Offers after the date
hereof as provided in section 8 of the Offers.  Under applicable
securities laws, such Shares must be taken up and paid for with
10 days of their deposit.


9.    AMENDMENTS TO OFFERS TO PURCHASE, OFFERING CIRCULAR, LETTER
OF ACCEPTANCE AND TRANSMITTAL AND NOTICE OF GUARANTEED DELIVERY

      The Offers to Purchase, the Offering Circular and the Letter
of Acceptance and Transmittal and Notice of Guaranteed Delivery
are hereby amended mutatis mutandis to reflect he amendments
contemplated by this Notice of Change and Variance.


10.   DIRECTOR'S APPROVAL

      The contents of this Notice of Change and Variation have
been approved, and the sending, communication or delivery thereof
to the holders of the Shares has been authorized, by the board of
directors of the Offeror.


11.   OFFEREES' STATUTORY RIGHTS

      Securities legislation in certain of the provinces and
territories of Canada provides security holders of DMR with, in
addition to any other rights they may have at law, rights of
rescission or damages, or both, if there is a misrepresentation
in a circular or notice that is required to be delivered to such
security holders.  However, such rights must be exercised within
prescribed time limits.  Security holders should refer to the
applicable provisions of the securities legislation of their
province or territory for the particulars of those rights or
consult with a lawyer.
<PAGE>
                              CERTIFICATE

October 19, 1995

      The foregoing contains no untrue statement of a material
fact and does not omit to state a material fact that is required
to be stated or that is necessary to make a statement not
misleading in the light of the circumstances in which it was
made.  In addition, the foregoing does not contain any
misrepresentation likely to affect the value or the market price
of the Shares which are the subject of the Offers, as amended by
this Notice of Change and Variation.

                    AMDAHL CANADA ACQUISITION, INC.


By:   /s/DENNIS R. ING          By:   /s/JAMES WENDLING
      -----------------               ------------------
      Dennis R. Ing                   James Wendling
      Chief Executive Officer         Chief Financial Officer


                  On behalf of the Board of Directors

By:   /s/DONALD C. ROSS         By:   /s/P. DOUGAL MACDONALD
      ----------------                ----------------------
      Donald C. Ross                  P. Dougal MacDonald
      Director                        Director
<PAGE>
                   The Depositary for the Offers is:
                   ---------------------------------


                   MONTREAL TRUST COMPANY OF CANADA


                         FOR DELIVERY BY MAIL:
                         --------------------

                      1800 McGill College Avenue
                               8th Floor
                           Montreal, Quebec
                                H3A 3K9


                   FOR DELIVERY BY HAND OR COURIER:
                   --------------------------------

1800 McGill College Avenue            151 Front Street West
8th Floor                             8th Floor
Montreal, Quebec                      Toronto, Ontario
H3A 3K9                               M5J 2N1
Facsimile:(514) 982-7347              Facsimile:(416) 981-9596
Telephone: (514) 982-7555             Telephone: (416) 981-9608

                510 Burrard Street
                2nd Floor
                Vancouver, B.C.
                V6C 3B9
                Facsimile:  (604) 661-9480
                Telephone:  (604) 661-0283


                   The Dealer Manager of the Offers:
                   ---------------------------------

RBC DOMINION                          RBC DOMINION
SECURITIES INC.                       SECURITIES INC.
Commerce Court South                  2000 McGill College
Toronto, Ontario                      Suite 300
M5L 1A7                               Montreal, Quebec
Marianne Anderson (416) 864-4509      H3A 3H5
Shaun Finnie (416) 941-5835           Jeffrey Drummond 
                                        (514) 282-5204
Emma Loewen (416) 864-4518


                       The Forwarding Agent is:
                       ------------------------

                        THE BANK OF NOVA SCOTIA
                       TRUST COMPANY OF NEW YORK
                           One Liberty Plaza
                              23rd Floor
                          New York, NY 10006
                       Facsimile: (212) 225-5438
                       Telephone: (212) 225-5436
