Walkman

Walkman, stylised as WALKMAN, is a brand of portable audio players manufactured and marketed by Japanese company Sony since 1979. The original Walkman started out as a portable cassette player and the brand was later extended to serve most of Sony's portable audio devices; since 2011 it consists exclusively of digital flash memory players. The current flagship product as of 2022 is the WM1ZM2 player. Walkman cassette players were very popular during the 1980s, which led to "walkman" becoming an unofficial term for personal stereos of any producer or brand. 220 million cassette-type Walkman were sold by the end of production in 2010; including digital Walkman devices such as DAT, MiniDisc, CD (originally Discman then renamed the CD Walkman) and memory-type media players, it has sold approximately 400 million at this time. The Walkman brand has also been applied to transistor radios, and Sony Ericsson mobile phones. The Compact Cassette was developed in 1963 by the Dutch electronics firm Philips. In the late 1960s, the introduction of prerecorded compact cassettes made it possible to listen to music on portable devices as well as on car stereos, though gramophone records remained the most popular format for home listening. Portable tape players of various designs were available, but none of them were intended to be operated by a person as they were walking. In the 1970s, Brazilian inventor Andreas Pavel devised a method for carrying a player of this type on a belt around the waist, listening via headphones, but his "Stereobelt" concept did not include the required engineering advancements to yield high-quality sound reproduction while the tape player was subject to mechanical shock as would be expected on a person walking. Pavel later lost his suit claiming the Walkman idea as his own. Sony cofounder Masaru Ibuka used Sony's bulky TC-D5 cassette recorder to listen to music while traveling for business. He asked executive deputy president Norio Ohga to design a playback-only stereo version optimized for walking.