The Following Are Commonly Used Knitting Abbreviations:

 alt  alternate  sl  slip
 beg  beginning  st(s)  stitch(es)
 cm  centimetres  stst  stocking stitch (1 row knit, 1 row purl)
 dec  decrease  ssk  slip, slip, knit
 fin(ing)  finish(ing)  tog  together
 inc  increase  tbl  through back of loops
 k  knit  yb  yarn back
 kb1  knit into back of next stitch  yf  yarn foward
 p  purl  yfrn  yarn forward and round needle
 pb1  purl into back of next stitch  yo  yarn over
 psso  pass slipped stitch over  yon  yarn over needle
 rep  repeat  yrn  yarn round needle