FS

FS (uncountable)

1. Abbreviation of fingerspelling.
2. Initialism of forward secrecy.

FS (third-person singular simple present FSes, present participle FSing, simple past and past participle FSed)

1. Abbreviation of fingerspell.

   "I like your name; it's really easy to FS!"

• http://www.signingsavvy.com/blog/75/FINGERSPELLING%E2%80%A6%E2%80%A6that+dirty+BIG+four-teen+letter+word

  "there is always a "FS" version, which lets you see the word fingerspelled"

• http://www.teachertube.com/viewVideo.php?video_id=21624

  "Description: Fs-Drill ... Tags: Fingerspelling Drill"

• S. F., S.F., SF, Sf, s-f, sf

FS (also FFSS)

1. Ferrovie dello Stato Italiane - Italian state railway