abbr. describing something that can be left out isn't required (*) I.P.O. (*) PIN (*) etc. (*) N/A

abbr. numeral; mathematical value or its symbol; unit in a series; part (*) PR (*) no. (*) Ph.D. (*) plc

abbr. legally established as a corporation (*) A.O.B. (*) Inc. (*) C.F.O. (*) Ltd.

abbr. cash payment to be made upon receipt of products or goods (*) AOL (*) C.O.D. (*) I.O.U. (*) G.N.P.

abbr. firm, company that is organized in such a way as to give its owners limited liability (*) Ltd. (*) hr (*) ASAP (*) plc

abbr. pound; unit of weight in ancient Rome equaling approximately 12 ounces (*) attn. (*) lb (*) pd. (*) AOL

abbr. manpower; personnel; human work force; human labor; staff (*) corp. (*) H.R. (*) R&D (*) HTML

abbr. directed to a particular person (generally used when addressing a letter or message) or issue (*) attn. (*) PTO (*) C.T.O. (*) C.C.

abbr. between noon and midnight; in the afternoon; after the hour of 12:00 noon (*) p.m. (*) C.C. (*) C.O.O. (*) Ltd.

abbr. secondary email address; copy of a document, message, or email that is sent to a third party (*) G.D.P. (*) PR (*) i.e. (*) C.C.