O

off-campus (adj.), off campus (adv.)

Hyphenate when used as an adjective: The university is looking at off-campus housing as an option.
Write two words, without hyphenation when used as an adverb: The student moved off campus.
Guidelines are the same for on-campus and on campus.

office

Capitalize when part of a proper name: She submitted her story to the Office of Communications
Use lowercase in all other uses : He visited the dean’s office.

Online Degree programs

A-State Online, known for being convenient, affordable, and valuable, allows a student to achieve educational goals on the individual's schedule. One of the oldest online degree programs in Arkansas, the degrees earned through A-State Online are identical to those earned by the more than 80,000 alumni of Arkansas State University.  Take a look at the complete list of online degrees offered at the undergraduate and graduate levelslevels.

osteopathic medical school (see NYIT entry)

osteopathic medicine, doctor of

Use D.O. to abbreviate doctor of osteopathy.  See the NYIT entry. The NYIT editorial style manual also is available here.