Anyway, I've decided to stick with "cas" as "compare-and-store". i really wish you wouldn't. as an example, google gives: Results 1 - 10 of about 19,400 for "compare and swap" cas Results 1 - 10 of about 50 for "compare and store" cas and infact there are only 22 results for the latter, and lot of them are this thread. .mrg.