was operational." Also in 1953 the company began work on a follow-on, the RAYCOM, which was never completed. In 1954 it entered into a joint venture with Honeywell to form the Datamatic corporation. However it sold its interest to Honeywell a year later, before introduction of the DATAmatic 1000 system. In 1958, Raytheon acquired the marine electronics company Applied Electronics Company, which significantly increased its strength in commercial marine navigation and radio gear, as well as less-expensive Japanese suppliers of products such as marine/weather band radios and direction-finding gear. In the same year, it changed its name to Raytheon Company. During the post-war years, Raytheon also made generally low- to medium-powered radio and television transmitters and related equipment for the commercial market, but the high-powered market was solidly in the hands of larger, better-financed competitors such as Continental Electronics, General Electric and Radio Corporation of America. In the 1950s, Raytheon began manufacturing transistors, including the CK722, priced and marketed to hobbyists. In 1961, the British electronics company A.C. Cossor merged with Raytheon, following its sale by Philips. The new Company's name was Raytheon Cossor. The Cossor side of the organisation is still current in the Raytheon group . In 1965, it acquired Amana Refrigeration, Inc., a manufacturer of refrigerators and air conditioners. Using the Amana brand name and its distribution channels, Raytheon began selling the first countertop household microwave oven in 1967 and became a dominant manufacturer in the microwave oven business. In 1966, the company entered the educational publishing business with the acquisition of D.C. Heath and Company, marketing an influential physics textbook developed by the Physical Science Study Committee. Raytheon also manufactured the Apollo Guidance Computer, which was introduced that year and flew aboard all NASA Project Apollo missions. In the late 1970s, Raytheon acquired McGraw-Edison's appliances division notable for the Speed Queen line of washers and dryers. 1980s In 1980, Raytheon acquired Beech Aircraft Corporation, a leading manufacturer of general aviation aircraft founded in 1932 by Walter H. Beech. In 1993 the company expanded its aircraft activities by adding the Hawker line of business jets by acquiring Corporate Jets Inc., the business jet product line of British Aerospace (now BAE Systems). These two entities were merged in 1994 to become the Raytheon Aircraft Company. In the first quarter of 2007 Raytheon sold its aircraft operations, which subsequently operated as Hawker Beechcraft, and since 2014 have been units