acc = account, accountant
　　acdg = according
　　acpt = accept
　　ad = advertisement
　　adm = administration
　　ads = address
　　adv = advice
　　agr = agriculture
　　agt = agent
　　alt = altitude
　　a.m. = ante meridiem = before noon
　　AMAP = as much as possible
　　amb = ambassador
　　amt = amount
　　anal = analysis
　　anc = ancient
　　anon = anonymous
　　ans = answer
　　app = appendix
　　Apr = April
　　apt = apartment
　　arch = architecture
　　arr = arrive; arrival
　　ASAP = as soon as possible
　　ass = assistant; association
　　at = atmosphere; atomic
　　att = attorney; attention
　　Aug = August
　　aux = auxiliary
　　av = average
　　anc = ancient
　　anon = anonymous
　　ans = answer
　　app = appendix
　　Apr = April
　　apt = apartment
　　arch = architecture
　　arr = arrive; arrival
　　ASAP = as soon as possible
　　ass = assistant; association
　　at = atmosphere; atomic
　　att = attorney; attention
　　Aug = August
　　aux = auxiliary
　　av = average
　　bu = bureau
　　C = capacity; century; chapter; centigrade; cost; city; center
　　cal = calendar; caliber; calories
　　cap = capital; captain
　　cat = catalog
　　cc = carbon copy (复印件；抄送)
　　CEO = chief executive officer
　　cert = certificate
　　CFM = confirm
　　cncl = cancel
　　cp. = compare
　　cit = citizen
　　civ = civil; civilization
　　clk = clerk
　　cml = commercial