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green lightning


green lightning: [IBM] n. 1. Apparently random flashing streaks on
   the face of 3278-9 terminals while a new symbol set is being
   downloaded.  This hardware bug was left deliberately unfixed, as
   some genius within IBM suggested it would let the user know that
   `something is happening'.  That, it certainly does.  Later
   microprocessor-driven IBM color graphics displays were actually
   *programmed* to produce green lightning!  2. [proposed] Any
   bug perverted into an alleged feature by adroit rationalization or
   marketing.  "Motorola calls the CISC cruft in the 88000
   architecture `compatibility logic', but I call it green
   lightning".  See also feature (sense 6).