Parenthesis In Description?

What do the different letters in a movie description mean?

(ftf)(gsn)(tcp)(eso)(sws)(ts)

What ones may I have missed and what do they stand for and mean?

Thanks

Sometimes it's the group that releases it... i.e. eso, tmd, sws, and such

Other times, it's a small description of the movie telling the quality... i.e. cam (camcorder), ts (telesync) and such.