Abbreviations are not used in this book, but they are used in other knitting books and patterns. Here is a list of commonly used abbreviations in knitting.
approx: approximately
alt: alternate
beg: beginning
BO: bind off
CC: contrasting color
cn: cable needle
CO: cast on
cont: continued
dec: decrease/decreasing
dpn(s): double-pointed needle(s)
foll: follow(s)/following
inc: increase/increasing
k: knit
kfb: knit in the front and the back of the same stitch
k2tog: knit two stitches together
LH: left-hand
lp(s): loop(s)
meas: measures
MC: main color
P: purl
pfb: purl in the front and back of the same stitch
PSSO: pass the slipped stitch over
p2tog: purl two stitches together
rem(s): remain(s)
rep: repeat
RH: right-hand
rnd(s): round(s)
RS: right side of the fabric
sl: slip
sl st: slip stitch
sl1: slip one stitch as if to purl from the left to the right needle
ssk: slip, slip, knit (slip two stitches one at a time as if to knit, knit these two stitches together through the back loops)
st st: stockinette stitch
tbl: through back loop(s)
tog: together
st(s): stitch(es)
WS: wrong side of the fabric
wyib: with yarn in back
wyif: with yarn in front
yds: yards
YO: yarn over (bring the yarn to the front in between the needles and over the right needle and to the back again)