CH, Ch, ch - chain stitch
DC, dc - double crochet
DEC, dec - decrease
DTR, dtr - double treble stitch
DTR, dtr - double treble stitch
Fsc, fsc - foundation
single crochet
HDC, hdc - half double
crochet
INC, inc - increase
SC, sc - single crochet
SL ST, sl st, Sl st,
SS - slip stitch
TR, tr - treble or triple
crochet
YO, yo - yarn over