Exhibit 3.21

                       RESTATED ARTICLES OF INCORPORATION
                               (without amendment)

                                       OF

                       CENTRAL TEXAS OFFICE PRODUCTS, INC.

1.    CENTRAL TEXAS OFFICE PRODUCTS, INC., pursuant to the provisions of Article
      4.07 of the Texas Business Corporation Act, hereby adopts restated
      articles of incorporation which accurately copy the articles of
      incorporation and all amendments thereto that are in effect to date and
      which contain no change in any provision thereof. The original articles of
      incorporation were filed by the Secretary of State on the Twenty-Sixth day
      of April, 1985.

2.    The restated articles were adopted by the board of directors of the
      corporation, by unanimous written consent of its members, filed with the
      minutes of the board of directors.

3.    The articles of incorporation and all amendments and supplements thereto
      are hereby superseded by the following restated articles of incorporation
      which accurately copy the entire text thereof:



                The articles of incorporated are amended and restated in their
                entirety as set forth in Exhibit A attached hereto and made a
                part hereof.



Dated Twenty-Fifth day of September, 1998.



                                      CENTRAL TEXAS OFFICE PRODUCTS, INC.

                                      By:  /s/  Mark D. Director
                                         --------------------------------------
                                                Its Vice President