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1) cf - Latin: confer or conferatur (both meaning "compare");
2) e.g. Latin: exempli gratia, meaning "for example";
3) etc - etcetera;
4) i.e - Latin: id est, meaning "that is";
5) viz Latin: Videlicet, meaning "namely";
6) NB nota bene, abbreviation that commonly used to call readers attention to something important;
7) PC portable computer;
8) veg - vegetable;
9) Interpol - The International Criminal Police Organization;
10) vacay - vacation;
11) perf - perforation;
12) EU European Union.