Cool, Bingley, thank you! It was interesting, seeing that chart with abbreviations; some have been here, and some not. (But I didn't like that they had bg, for big grin: it should be EG, for "enormous grin". tsuwm has said so, and so therefore, it IS that way.)

I do have a question, based on this line the writer used: cc, for example, has a new gloss as "complimentary copy," now that carbon copies are a distant memory.
When and how did the word gloss come to be used in this sense, please?