(IEEE) (1) The arrangement of a computer system or component as defined by the number, nature, and interconnections of its constituent parts. (2) In configuration management, the functional and physical characteristics of hardware or software as set forth in technical documentation or achieved in a product.
Inc. after a company name means that the business in question has incorporated within its home state. Status as a C-corporation or an S-Corporation depends on tax filings with the Internal Revenue Service. Incorporation produces a separate entity -- in essence a fictional person created by law.
Ltd. is also used from time to time with companies in the United States. Some state statutes permit the use of ltd. in place of inc. for a corporation, according to Business Organizations by D. Gordon Smith and Cynthia A. Williams.