molly-guard: /mol'ee-gard/ [University of Illinois] n.

:molly-guard: /mol'ee-gard/ [University of Illinois] n. 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.
-- The AI Hackers Dictionary

Related:

• 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...
• Big Red Switch: [IBM] n. The power switch on a computer,
  esp. the `Emergency Pull' switch on an IBM {mainframe}...
• scram switch: [from the nuclear power industry] n. An emergency-power-off switch (see {Big Red Switch}),
  esp. one positioned to be easily hit by evacuating...
• BRS: /B-R-S/ n. Syn. {Big Red Switch}. This abbreviation is fairly common on-line.
  The AI Hackers...
• Big Red Switch n. [IBM] The power switch on a computer,
  esp. the `Emergency Pull' switch on an IBM mainframe...
• 120 reset: /wuhn-twen'tee ree'set/ [from 120 volts,
  U.S. wall voltage] n. To cycle power on a machine...
• DWIM /dwim/ [acronym, `Do What I Mean'] 1. adj. Able to guess,
  sometimes even correctly, the result intended when...
• yellow wire: [IBM] n. Repair wires used when connectors (especially ribbon connectors) got broken due to some schlemiel pinching them,
  or to reconnect cut traces after the FE mistakenly...
• byte:: /bi:t/ [techspeak] n. A unit of memory or data equal to the amount used to represent one character;
  on modern architectures this is usually 8 bits,...