A wireless access point (also called AP or Wap) joins wireless clients to a wired Ethernet Network. They are configured nodes on a wireless local area network.
Wireless access points are mainly used in large office buildings. They create one wireless local area network. Every access point can support up to 255 client computers. Wireless Access APoints are also used for home networking as well, to extend a home network.
http://www.historyofcomputercommunications.info/
Back in 1965, scientists did not have a clue how to interconnect two even two computers. Scientists never even fathomed the idea that decades later that millions of computers around the globe would interconnect. The way they communicated would look crude and incompleted by all standards of today but they were able to share information electronically between computers and application programs of every kind.
Data Communications is defined by two major technologies and product categories: modems and multiplexers. It emerged between 1968 and 1972. Networking emerged between 1979 and 1982. Internetworking emerged between 1984 and 1988. A need for corporations to interconnect LANS into wide area networks prompted Internetworking.