a.s.a.p.

also asap, adverbial phrase pronounced either as a word (acronym) or as four letters (initialism), 1920, in a list of abbreviations recommended for secretaries in dental offices, from initial letters of phrase as soon as possible. The article (Walter E. Fancher, D.D.S., "The Practical Application of the Dental Hygienist in General Practice," in Oral Hygiene, March 1920) also has A.S.A.C. for as soon as convenient.