Big Red Switch - definizione. Che cos'è Big Red Switch
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Cosa (chi) è Big Red Switch - definizione

SAFETY MECHANISM TO QUICKLY SHUT DOWN A SYSTEM IN AN EMERGENCY, WHEN IT CANNOT BE SHUT DOWN IN THE USUAL MANNER
Big Red Switch Time; Emergency shut-off; Big red button; Emergency stop; Panic stop; Big Red Switch; Killswitch; Molly guard; Molly-guard; E-Stops; Big red switch; Big Red Button; Emergency power off; Emergency power-off; Emergency Power-Off; Kill-switch; E-stop; Emergency fuel cut off switch; Remote kill-switch; Remote kill switch; Backdoor off-switch; Backdoor off switch; Backdoor kill switch; Backdoor kill-switch; Remote off switch; Remote off-switch
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  • An emergency stop button with a custom-made plastic molly guard to prevent it from being pressed accidentally

Big Red Switch         
[IBM] The power switch on a computer, especially the "Emergency Pull" switch on an IBM mainframe or the power switch on an IBM PC where it really is large and red. "This !@%$% bitty box is hung again; time to hit the Big Red Switch." Sources at IBM report that, in tune with the company's passion for TLAs, this is often abbreviated as "BRS" (this has also become established on FidoNet and in the IBM PC world). It is alleged that the emergency pull switch on an IBM 360/91 actually fired a non-conducting bolt into the main power feed; the BRSes on more recent mainframes physically drop a block into place so that they can't be pushed back in. People get fired for pulling them, especially inappropriately (see also molly-guard). Compare {power cycle}, three-finger salute, 120 reset; see also {scram switch}.
Kill switch         
A kill switch, also known as an emergency stop (E-stop), emergency off (EMO) and as an emergency power off (EPO), is a safety mechanism used to shut off machinery in an emergency, when it cannot be shut down in the usual manner. Unlike a normal shut-down switch or shut-down procedure, which shuts down all systems in order and turns off the machine without damage, a kill switch is designed and configured to abort the operation as quickly as possible (even if it damages the equipment) and to be operated simply and quickly (so that even a panicked operator with impaired executive functions or a bystander can activate it).
molly-guard         
/mol'ee-gard/ [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 generalised to covers over stop/reset switches on disk drives and networking equipment. [Jargon File]

Wikipedia

Kill switch

A kill switch, also known as an emergency brake, emergency stop (E-stop), emergency off (EMO) and as an emergency power off (EPO), is a safety mechanism used to shut off machinery in an emergency, when it cannot be shut down in the usual manner. Unlike a normal shut-down switch or shut-down procedure, which shuts down all systems in order and turns off the machine without damage, a kill switch is designed and configured to abort the operation as quickly as possible (even if it damages the equipment) and to be operated simply and quickly (so that even a panicked operator with impaired executive functions or a bystander can activate it). Kill switches are usually designed to be noticeable, even to an untrained operator or a bystander.

Some kill switches feature a removable, protective barrier against accidental activation (e.g. a plastic cover that must be lifted or glass that must be broken), known as a mollyguard. Kill switches are features of mechanisms whose normal operation or foreseeable misuse might cause injury or death; industrial designers include kill switches because damage to or the destruction of the machinery is less important than preventing workplace injuries and deaths.

A similar system, usually called a dead man's switch, is a device intended to stop a machine (or activate one) if the human operator becomes incapacitated or leaves the machine unattended, and is a form of fail-safe. They are commonly used in industrial applications (e.g., locomotives, tower cranes, freight elevators) and consumer applications (e.g., lawn mowers, tractors, personal watercraft, outboard motors, snow blowers, motorcycles and snowmobiles). The switch in these cases is held by the user, and turns off the machine if they let go. Some riding lawnmowers have a kill switch in the seat which stops the engine and blade if the operator's weight is no longer on the seat.