can

can vt.  To abort a job on a time-sharing system.  Used
   esp. when the person doing the deed is an operator, as in
   "canned from the {{console}}".  Frequently used in an imperative
   sense, as in "Can that print job, the LPT just popped a
   sprocket!"  Synonymous with {gun}.  It is said that the ASCII
   character with mnemonic CAN (0011000) was used as a kill-job
   character on some early OSes.  Alternatively, this term may derive
   from mainstream slang `canned' for being laid off or fired.