Adding a morse taper to drill press.

[mklotz]

Good writing practice says that one should indicate the meaning of an acronym the first time it is used in an article. For example, when you talk about calculating CEP (Circular Error Probable) an expansion of the acronym as well as an explanation of the quantity is in order. Many writers ignore this rule, in which case you need to be aware of the acronym dictionary...

Abbreviations and acronyms dictionary

Well worth bookmarking with your other dictionaries. I've encountered very few acronyms that I couldn't find there.