a.d.q. = almost a direct quotation – While you’ve changed a word or two, this is virtually a direct quotation. Either make it a direct quotation and give credit or rephrase it in your own words. (The second option is preferable.)
awk. = awkward – The phrase indicated may not be ungrammatical but it is poorly put.
con.= consistency - You're being inconsistent here, i.e., you seem to be contradicting yourself.
d.m.s. = the word or phrase indicated doesn't make sense (often, the reason may be because you've left out a word or misused a word)
f.s. = fragment sentence
m.q. = misquotation – The quotation is inaccurate.
m.v.t. = mismatched verb tenses – You've switched verb tense midway through the sentence, usually from past to present or vice versa.
m.w. = missing word
n.n.p. = no new paragraph – You've started a new paragraph where you shouldn't.
p.n.m. = pronoun-noun mismatch - A pronoun here isn't referring to what you want it to.
red. = redundant – The phrase or word indicated is unnecessary, e.g., free gift.
r.o.s. = run-on sentence. Simplify this sentence or break it up.
r.w. = repeated word (or sentence) - You're repeating yourself.
sp. = incorrect spelling
s.p.m. = singular-plural mismatch – This usually occurs when you use a plural pronoun to refer back to a singular term, e.g. 'if a person believes this then they have to …'
trans. = transition – Where indicated, you need to make a better transition from paragraph to paragraph (or sentence to sentence).
t.n.s. = This needs support.
u.d.q. = uncredited direct quotation – This is plagiarism (it's not always done on purpose, I know, but it's still plagiarism). Direct quotations must always be attributed. Alternately (and usually preferably), use your own words in stead.
unc. = unclear
v.s.d. = verb-subject disagreement. The verb is not conjugated properly, e.g., they is hungry.
w.c. = word choice – You've used a word in an incorrect or awkward way.
Consult a dictionary.