(October 2016) In the internet protocol suite, a port is an endpoint of communication in an operating system. While the term is also used for female connectors on hardware devices (see computer port), in software it is a logical construct that identifies a specific process or a type of network service.
Microsoft's first Headquarters. The Historic Microsoft Headquarters are located in Albuquerque, New Mexico. Microsoft Inc. was founded here and remained in Albuquerque from 1975 to 1979 before moving to Seattle.
Microsoft's major breakthrough occurred in 1981 when the company furnished an operating system for IBM's first major entry into personal computers. Called PC-DOS by IBM, Microsoft also marketed its own version, MS-DOS (Microsoft Disk Operating System). The early 1980s saw both IBM's and Microsoft's fortunes soar. Microsoft dominated the software market, just as IBM dominated the personal computer market.