Abbreviations and Acronyms:  S - Z

s.a.

From Latin sine anno, meaning "without a year," indicating that a document's date of publication is unknown.

sc.

From scilicet, a contraction of Latin scire licet, meaning "it is permitted to know."  Both sc. and viz. introduce additional information regarding something stated earlier, often in the form of a list.  While sc. removes an ambiguity or supplies a word omitted in the preceding text, viz. elaborates or adds detail.

s.l.

From Latin sine loco, meaning "without a place," indicating that a document's place of publication is unknown.

s.n.

From Latin sine nomine, meaning "without a name," indicating that a document's publisher is unknown.

s.v.

From Latin sub verbo or sub voce, meaning "under the word" or "under the heading."

v.gr. or VG

From Latin verbi gratia, literally, "thanks to the words," meaning "for example."

v.i.

From Latin vide infra, meaning "see below."

viz.

From videlicet, a contraction of Latin videre licet, meaning "it is permitted to see" and used to mean "namely," "that is to say," "to wit," and "as follows."  See sc. above.

vs or v.

From Latin versus, meaning "in the direction" or "towards."  Vs or v. separates opposing parties, as in a legal dispute. 

v.s.

From Latin vide supra, meaning "see above."

vol.

From volume(s).