K = knit

P = purl

K2tog = knit two together

P2tog = purl two together

PSSO = pass the slipped stitch over

Sts = stitches

St = stitch

R = row/round

CO = cast on

BO = bind off

M1 = pick up with the left needle the horizontal stitch between the two needles

YO = yarn over

dpn = Double pointed needles