No doubt a lot of the common abbreviations used here would be unfamiliar and sometimes confusing to anyone first starting out. I can still remember they were for myself. Mostly I think there just a short form of typing it out, [H.S.S.] or High Speed Steel would be a common one. If I were talking with someone, I’d more likely just say High Speed Steel instead of using it’s common abbreviation.
Books related to machining do much the same. George Thomas for example used them often, but did include a glossary of the terms in the back of his books. A bit of a pita☺ and some abbreviations in the UK aren’t common in North America. [SS] [GM] for Silver Steel and Gunmetal as examples. I don’t think that [S.S.] or [G.M.] is ever used here. His use of [L.A.] for Aluminum Alloy was one I definitely had to check his glossary for. So having a glossary of terms for the UK forum members here might also require what they mean elsewhere? Every industry, craft or hobby has the same I suppose. It’s just learning and then remembering what those abbreviations mean. Even using the same basic English between the UK and say North America, there’s non abbreviated terms in use that aren’t used elsewhere. Spanner for you / wrench for us, exact same thing but different word.
Now terms like using digi-verns by some while meaning digital calipers might be a bit over the top since vernier calipers are quite different than the digital models. Their both calipers and make the same type of measurements, but quite obviously different in how it’s accomplished. And while technically correct over 100 years ago, using the word Jib today that some seem to still do instead of Gib, might definitely be confusing to those just starting out. Possibly I’m being pedantic to some, or maybe to others I’m not?