| 1. | the letters represented by the radio telegraphic signal (⋅⋅⋅ – – – ⋅⋅⋅) used, esp. by ships in distress, as an internationally recognized call for help. |
| 2. | any call for help: We sent out an SOS for more typists. |
| 3. | to send an SOS. |

| (in prescriptions) if necessary. |

|
shit out of luck
and SOL
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so
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"The adverb so at the beginning of a sentence ('So I'll pay for it!'), probably of Yiddish origin, occurs frequently in conversation." [M.Pei, "Story of English," 1952]
SOS
In currencies, this is the abbreviation for the Somali Shilling.
Investopedia Commentary
The currency market, also known as the Foreign Exchange market, is the largest financial market in the world, with a daily average volume of over US $1 trillion.
See also: Currency, FOREX, Hard Currency, Money
Also spelled: SOS
sol (sôl, sōl)
n.
A colloidal dispersion of a solid in a liquid.
s.o.s. abbr.
Latin si opus sit (if needed)
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.
[The Jargon File]
SOS
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