Latin abbreviations are acceptable only in footnotes and bibliographies and in informal writing for comments in parentheses.
cf. (Latin confer, “compare”)
e.g. (Latin exempli gratia, “for example”)
et al. (Latin et alii, “and others”)
etc. (Latin et cetera, “and so forth”)
i.e. (Latin id est, “that is”)
NB (Latin nota bene, “note well”)
Harold Simms et al., The Race for Space
Exercise: Abbreviations