SOS

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]