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molly-guard

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molly-guard /mol´ee·gard/ n.

[University of Illinois] A shield to prevent tripping of some Big Red Switch by clumsy or ignorant hands. Originally used of the plexiglass covers improvised for the BRS on an IBM 4341 after a programmer's toddler daughter (named Molly) frobbed it twice in one day. Later generalized to covers over stop/reset switches on disk drives and networking equipment. In hardware catalogues, you'll see the much less interesting description “guarded button”.

The Jargon File

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The crunchly saga

The infamous Crunchly cartoons by The Great Quux are woven into the lexicon, each next to an appropriate entry. To read them in the sequence in which they were written, chase pointers from here using the ‘next cartoon’ information in the captions.