have been suggested factors of its performance. Its U.S. market share in 2006 was 1.9%, placing it behind Apple, SanDisk, Creative and Samsung. In Japan its share in 2009–2010 was between 43 and 48%, slightly ahead of Apple. Meanwhile, Sony Computer Entertainment, a Sony division who are not involved in Walkman products, officially described their PlayStation Portable in 2004 as the "21st century Walkman". Current range Walkman portable digital audio and media players are the only Walkman-branded products still being produced today – although the "Network" prefix is no longer being used, the model numbers still carry the "NW-" prefix. The current product range as of 2022 are: A Series – flagship mid-range players B Series (except Japan) – budget-oriented thumb style music players E Series – entry level players S Series (Japan) – entry level players W/WS Series – wearable music players WM1 Series – flagship luxurious high-end players (part of Sony's Signature Series of audio products) ZX Series – high-end music players Since 2017, Sony also provide the Music Center for PC software on Microsoft Windows, designed for both content transfer and playback for Walkman and other audio products. See also Walkman effect Stereobelt List of Sony Walkman products Sony Watchman Discman PlayStation Portable Notes References External links Official Sony website Products introduced in 1979 1980s fads and trends 1990s fads and trends Products and services discontinued in 2010 Consumer electronics brands Audio players Japanese inventions Portable media players Sony Ericsson mobile phones Sony products Models of radios