Yes you can, depending on the type of document. I wouldn't suggest you use abbreviations in formal writings, but in tables, graphs, etc., abbreviations are acceptable.
- Totally acceptable and natural a) See yous later! b) (Who ate the chocolate?) It was me. c) I ain't interested in that. d) I'm not bothered by that at all. e) It wasn't I. f) Who should I give this …
'Acceptable to' is not really used in this situation. 'Approved by' and 'accepted by' are both perfectly fine, although I think 'approved' is a more typical usage. As a side note, program and report …
I also add that in AmE it is acceptable to use friendly both as an adverb and as a noun. There may an example in which 'friendly' is an adverb, but ordinarily it is not an adverb. It is an …
I'm not sure that there should logically be any objections to "commit oneself to do something" if "commit to do something" and "stand/be committed to do something" are acceptable.
And what did you [say you] hope to be when you grow up? I agree with you that that sentence is acceptable, but you have added a verb and a complement clause: "say [that] you . . . ." …
as lingobingo points out, as per is acceptable and not incorrect. It is usually used in business or legal communications and not in casual conversation unless you enjoy trying to impress …
In British Englsih I'm sure it's acceptable, and after all, in spoken English "earnt" seems to me far easier to say than "earned".