The Jargon File (version 4.4.7, 29 Dec 2003):

turist
 /too'rist/, n.

    Var. sp. of tourist, q.v. Also in adjectival form, ?turistic?. Poss.
    influenced by luser and ?Turing?.


The Free On-line Dictionary of Computing (30 December 2018):

turist

   /too'rist/ Variant spelling of tourist.  Possibly influenced
   by luser and "Turing".

   [Jargon File]