Below is an incomprehensive list of commonly used abbreviations, in Latin. Without looking them up, how many can you correctly expand? You can check your answers at the bottom of the post.
I) A.D.
II) A.M.
III) c., ca., cca
IV) C.V.
V) et al.
VI) etc.
VII) e.g.
VIII) i.e.
IX) M.O.
X) N.B.
XI) p.a.
XII) per cent
XIII) P.M.
XIV) P.S.
XV) q.v.
XVI) Re
XVII) R.I.P.
XVIII) viz.
XIX) vs / v.
XX) id.
anno Domini A.D.
ante Meridiem A.M.
circa c., ca., cca
curriculum vitae C.V.
et alii / et alia et al.
et cetera etc.
exempli gratia e.g.
id est i.e.
modus operandi M.O.
nota bene N.B.
per annum p.a.
per centum per cent
post meridiem P.M.
post scriptum P.S.
quod videre q.v.
in re Re
requiescat in pace R.I.P.
videlicet viz.
versus vs / v.
idem id.
http://en.wikipedia.org/wiki/List_of_Latin_abbreviations
My score, a dismal 10/20
I) A.D.
II) A.M.
III) c., ca., cca
IV) C.V.
V) et al.
VI) etc.
VII) e.g.
VIII) i.e.
IX) M.O.
X) N.B.
XI) p.a.
XII) per cent
XIII) P.M.
XIV) P.S.
XV) q.v.
XVI) Re
XVII) R.I.P.
XVIII) viz.
XIX) vs / v.
XX) id.
anno Domini A.D.
ante Meridiem A.M.
circa c., ca., cca
curriculum vitae C.V.
et alii / et alia et al.
et cetera etc.
exempli gratia e.g.
id est i.e.
modus operandi M.O.
nota bene N.B.
per annum p.a.
per centum per cent
post meridiem P.M.
post scriptum P.S.
quod videre q.v.
in re Re
requiescat in pace R.I.P.
videlicet viz.
versus vs / v.
idem id.
http://en.wikipedia.org/wiki/List_of_Latin_abbreviations
My score, a dismal 10/20