Java Joint—coffee bar on the lower level of Pearsons Hall. See appendix.
J.D.—Doctor of Jurisprudence degree (both earned and honorary)
Jeffris-Wood Campus Center—may also be referred to as the campus center; see Pearsons Hall. See appendix.
Jr., III, etc.—abbreviate and capitalize when part of someone's name; precede by a comma except when writing for the press. See commas.