(From TV programming) Normal high-usage hours on a time-sharing system the day shift. Avoidance of prime time was traditionally given as a major reaSOn for night mode hacking. The rise of the perSOnal workstation has rendered this term, along with time-sharing itself, almost obSOlete. The hackish tendency to late-night hacking runs has changed not a bit. [Jargon File] (1995-01-18)