The history of video game consoles, both home and handheld, had their origins in the 1970s. The concept of home consoles used to play games on a television set was founded by the 1972 Magnavox Odyssey, first conceived by Ralph H. Baer in 1966. Handheld consoles bore out from electro-mechanical games that had used mechanical controls and light-emitting diodes (LED) as visual indicators. Handheld electronic games had replaced the mechanical controls with electronic and digital components, and with the introduction of Liquid-crystal display (LCD) to create video-like screens with programmable pixels, systems like the Microvision and the Game & Watch became the first handheld video game consoles, and fully realized by the Game Boy system. Since then, home game consoles have progressed through technology cycles typically referred to as generations, each lasting approximately five years, during which competing manufacturers have produced consoles with similar specifications. With underlying improvements to technology such as smaller and faster microprocessors, digital communications, and changes to business models, a new generation of consoles is evolved from the previous one. This has led to a shifting landscape of console manufacturers in the marketplace; while early generations were led by manufacturers like Atari and Sega, the current modern generations have come down to three major competitors, Nintendo, Sony Interactive Entertainment, and Microsoft. Handheld consoles have seen similar advances, though typically are grouped into the same generations as home consoles. While there were larger numbers of manufacturers in the earlier generations for handhelds which included Nintendo, Atari, Sega, and Sony, the handheld market has waned since the introduction of mobile gaming in the mid-2000s, and as of today, the only major manufacturer in handheld gaming is Nintendo. Origins While both home and handheld game consoles strive to allow consumers to play video games on personal devices, their points of origin came from different fields, and only more recently can be seen as deriving from common principles. Home consoles The first video games were created on mainframe computers in the 1950s, typically with text-only displays or computer printouts, and limited to simple games like Tic Tac Toe or Nim. Eventually displays with rudimentary vector displays for graphics were available, leading to titles like Spacewar! in 1962. Spacewar! directly influenced Nolan Bushnell and Ted Dabney to create Computer Space in 1971, the first recognized arcade game. Separately, while at Sanders Associates in 1966, Ralph H. Baer conceived of the idea