1  definition  found 
 
  From  Jargon  File  (4.2.3,  23  NOV  2000)  [jargon]: 
 
  OSU  /O-S-U/  n.  obs.  [TMRC]  Acronym  for  Officially  Sanctioned 
  User;  a  user  who  is  recognized  as  such  by  the  computer  authorities  and 
  allowed  to  use  the  computer  above  the  objections  of  the  security  monitor. 
 
 

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