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AR in D2 used to mean Attack Rating. Now it means All Resist. It has been a confusing adjustment.
Also: CD can mean cooldown.
Basically, I think it's more helpful to the community if you stop using them altogether and ask whenever somebody says something that you don't understand. There's no point in compiling a list because people just continuous make new acronyms to replace old ones anyways.
Acronyms are for people who type their words one key at a time with their index finger.
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