e.g. example i.e. that is cf. compare
viz. namely N.B. note C19 nineteenth century
1st. first 2nd. second 3rd. third
G.B. Great Britain Eng. English Q. question
A. answer NO. number Acad. Academifor
For. foreign Excl. excluding Re. with reference to
Diff. diifficulty Dept. department Disc. discussion
Econ. economical biblio. bibliography Gen General
Govt. government Imp. important mat. material