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SOS 安全操作系统 安全操作系统 SOS n 1: an internationally recognized distress signal in radio code SOS \SOS\ The letters signified by the signal ( . . . --- . . . ) prescribed by the International Radiotelegraphic Convention of 1912 for use by ships in distress. [Webster 1913 Suppl.] 44 Moby Thesaurus words for "SOS": Klaxon, Mayday, air-raid alarm, alarm, alarm bell, alarm clock, alarm signal, alarum, alert, all clear, beacon, blinking light, burglar alarm, buzzer, crostarie, fiery cross, fire alarm, fire bell, fire flag, five-minute gun, flashing light, fog bell, fog signal, foghorn, gale warning, hooter, horn, hue and cry, hurricane warning, lighthouse, note of alarm, occulting light, police whistle, signal of distress, siren, small-craft warning, still alarm, storm cone, storm flag, storm warning, tocsin, two-minute gun, upside-down flag, whistle 1. {Scheme Object System}.
2. An infamously {losing} text editor. Once, back in the 1960s, when a text editor was needed for the {PDP-6}, a hacker {crufted} together a {quick-and-dirty} "stopgap editor" to be used until a better one was written. Unfortunately, the old one was never really discarded when new ones (in particular, {TECO}) came along. SOS is a descendant ("Son of Stopgap") of that editor, and many {PDP-10} users gained the dubious pleasure of its acquaintance. Since then other programs similar in style to SOS have been written, notably the early font editor BILOS /bye'lohs/, the Brother-In-Law Of Stopgap (the alternate expansion "Bastard Issue, Loins of Stopgap" has been proposed). 3. The {PDP-10} instruction to decrease a value. Oppose {AOS}. [{Jargon File}]
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