Home Articles FAQs XREF Games Software Instant Books BBS About FOLDOC RFCs Feedback Sitemap

Big Red Switch

You are here: irt.org | FOLDOC | Big Red Switch

<jargon> (BRS) IBM jargon for 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."

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.

[Jargon File]


Nearby terms: Bigloo « bignum « bigot « Big Red Switch » Big Room » big win » bijection

FOLDOC, Topics, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, ?, ALL

©2018 Martin Webb