The Collaborative International Dictionary of English v.0.48:

digitize \dig"i*tize\ (d[i^]j"[i^]*t[imac]z), v. t. [Digit +
   -ize.]
   1. To finger; as, to digitize a pen. [R.] --Sir T. Browne.

   2. (Computers) To convert (information, a signal, an image)
      into a form expressible in numbers or in binary notation.
      The original signal before digitization is usually in
      analog form.

   Note: Digitization allows convenient storage, accurate
         reproduction, modification and other manipulations by
         digital computers.
         [PJC]

WordNet (r) 3.0 (2006):

digitize
    v 1: put into digital form, as for use in a computer; "he bought
         a device to digitize the data" [syn: digitize,
         digitise, digitalize, digitalise]