Feature

 FEATURE n. 1. A surprising property of a program. Occasionally docu-
       mented. To call a property a feature sometimes means the author of the
       program did not consider the particular case, and the program makes an
       unexpected, although not strictly speaking an incorrect response. See
       BUG. "That's not a bug, that's a feature!" A bug can be
       changed to a feature by documenting it. 2. A well-known and beloved
       property; a facility. Sometimes features are planned, but are called
       crocks by others. An approximately correct spectrum: (These terms are
       all used to describe programs or portions thereof, except for the
       first two, which are included for completeness.) CRASH STOPPAGE BUG
       SCREW LOSS MISFEATURE CROCK KLUGE HACK WIN FEATURE PERFECTION (The
       last is never actually attained.)