I am just starting out knitting and could always use some needles-- Every pattern I like uses more than one set!! Also what is a PM?
Ah, depend on where you see it. In threads in this section it is most likely to be a private message. Click on any member name to the left of a post and you will see an option to send a PM to that member.
In a pattern, PM would be place marker and later you should also see MM for move marker.
Amy (originator, author, star, knitter-in-chief, and Grand Poobah of the KH site) has an abbreviation thread that list the common initialisms here.
Ah but she didn't put PM in the list.. yet.
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--Jack
Master of Crochet, apprentice of Knit