EXHIBIT 10.1
(Graphic - Fleet Letterhead)

May 28, 1996

Mr. Paul Lacy
Vice President of Finance & Administration
Kronos Incorporated
400 Fifth Avenue
Waltham, MA  02154

Dear Paul:

We are pleased to inform you that Fleet  National  Bank  ("Bank"),  successor to
Fleet Bank of  Massachusetts,  N.A.,  has  approved  the renewal of the existing
$3,000,000 revolver ("Revolver") held available to Kronos, Inc. ("Borrower") for
two (2) years,  until June 1, 1998. As in the past,  advances under the Revolver
shall bear interest at your option of either the "Prime"  rate, or  LIBOR+1.75%.
Also, as in the past,  the Bank  continues to maintain a 3/8%  commitment fee on
the unused portion of the subject Revolver. "Prime Rate" is defined as that rate
from time to time  announced  and made  effective by the Bank as the Prime Rate.
Your  borrowing  rate shall change as the Prime Rate changes.  Interest shall be
made payable  monthly in arrears.  Interest and fees are calculated on the basis
of a 360 day year and actual days elapsed.

It should be noted that at various  times  within the terms of this  commitment,
advances  may be allocated  for Letters of Credit so long as that in  aggregate,
advances under the revolver do not exceed the total committed amount.

Additionally  approved was a two (2) year renewal of the existing $1.0MM Foreign
Exchange Line, until June 1, 1998.

Notwithstanding  the  aforementioned,  all  other  terms and  conditions  of the
existing Loan Agreement remain in full force and effect.  If the  aforementioned
terms and  conditions  continue to meet with your approval,  please  acknowledge
your  understanding and acceptance by signing this letter and returning it to my
attention at:

                                    Fleet National Bank
                                    75 State Street
                                    Boston, Massachusetts  02109
                                    MABOFO4H

Also,  please sign the enclosed  Addendum to the existing Loan  Agreement  which
serves to address the Bank's  recent change in name to Fleet  National  Bank. If
you have any questions, please call me at (617) 346-1856.

                                                     Sincerely,
                                                     /s/ Ann M. Dillon
                                                     Ann M. Dillon
                                                     Vice President

Acknowledged and Accepted:

/s/ Paul Lacy                       6/3/96
- -------------------------     ------------
Kronos Incorporated                       Date
Paul Lacy
Vice President of Finance & Administration



                                   ADDENDUM TO


     Loan  Agreement  dated  June  30,  1993,  and  subsequently   amended  (the
"Instrument"),  between Kronos Incorporated  (collectively or singularly, as the
case may be, the "obligor") and the Bank referred to in the instrument.

Notwithstanding  anything  to the  contrary  contained  in the  Instrument,  the
Obligor hereby  acknowledges  and agrees that any and all references  therein to
"Fleet Bank of Massachusetts,  N.A.," shall be deemed to refer to Fleet National
Bank.

     IN WITNESS WHEREOF,  the Obligor has executed this Addendum this 3rd day of
June, 1996.

                                      Obligor:

                                      Kronos Incorporated


                                      By: __/s/ Paul Lacy_________________
                                                Print Name:  Paul Lacy
                                            Title:  Vice President of Finance &
                                                                  Administration