1) About 2) About in legal matters 3) About in legalspeak 4) About on a memo 5) About on memos 6) About to rein 7) About, contractually 8) About, formally 9) About, formally speaking 10) About, legally speaking 11) About, memo-style 12) About, memo-wise 13) Anent 14) Apropos of 15) As concerns 16) As for