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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.

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".

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