R.O. == Run On Sentences

Frag == Sentence Fragments

Comma == Your general use of commas; comma splices

Awk == Awkward phrases or word usage

W.C. == Word Choice (you chose the wrong word)

Punct == Punctuation

Q.I. == Poor quote integration (interspersing the words of others with your own)

Redundancies == Using the same word or words over and over

S/V == Subject/Verb Agreement

Art == Article Usage (a/an; the)

Possessives == ‘s