American UK
st stitch st stitch
ch chain ch chain
sc single crochet dc double crochet
dc double crochet tr treble
hdc half double crochet htr half treble
inc increase inc increase
dec decrease dec decrease
FLO front loop only FLO front loop only
BLO back loop only BLO back loop only
sl st slip stitch sl st slip stitch
tr triple crochet dtr double treble
MB / bo make bobble MB / bo make bobble