The Collaborative International Dictionary of English v.0.48:

digitalization \digitalization\ n.
   1. the administration of digitalis for the treatment of
      certain heart disorders.

   Syn: digitalisation.
        [WordNet 1.5]

   2. the effect produced by the administraation of dititalis.
      [PJC]

WordNet (r) 3.0 (2006):

digitalization
    n 1: the administration of digitalis for the treatment of
         certain heart disorders [syn: digitalization,
         digitalisation]