Trainmaster Command (TMCC) is Lionel's electronic control system for O scale 3-rail model trains and toy trains that mainly ran from 1994 to 2006. Conceptually it is similar to Digital Command Control (DCC), the industry's open standard used by HO scale and other 2-rail DC trains. It has one advantage over DCC, in that TMCC-equipped locomotives can run simultaneously with non-TMCC locomotives and Lionel Legacy engines as well as LionChief and LionChief Plus equipped locomotives. The latter require a dedicated remote controller. MTH Corporation's DCS controller can be configured to control TMCC locomotives, and all four systems (TMCC, Legacy, LionChief/LionChief+ and DCS) can be operated on the same track simultaneously. Each simply requires a constant track voltage (18 volts). TMCC/Legacy "broadcasts" its signal to the antenna on the locomotives which listen for signals that first identify the particular locomotive by number and then it issues given commands as to speed, direction, sounds, lighting and other features. DCS performs similar functions but transmits a carrier over the rails which are picked up through the locomotive's electrical pickup contacts. While TMCC/Legacy and DCS remote controls relay operator commands to a device that transmits them to the train (Command Base or Track Interface Unit), LionChief/LionChief+ also issue remote control commands but the remote and locomotive are married and each locomotive requires a separate remote control. This system requires no additional wiring as the control is directly "narrowcast" to the locomotive in the same way as a television remote control or garage door opener functions. In 2017, Lionel released a universal remote for LionChief+ that will learn addresses for up to three locos at a time, simplifying the operation of multiple trains. TMCC permits operation of multiple trains on the same track without complex wiring, and also gives locomotives realistic digitized sounds. Its development was backed financially by rock and roller Neil Young as part of a partnership between Young and one-time Lionel owner Richard Kughn known as Liontech. Liontech, roughly headquartered on Young's northern California ranch, consisted of a loose confederation of technology developers whom Young had assembled to help develop individual components of the TrainMaster Command system. Chief among these contributors was Applied Design Laboratories of Grass Valley, California, headed by Atari 2600 co-patent holder Ron Milner. Young had been referred to Milner by his neighbor and friend, Nolan Bushnell, co-founder of Atari. Milner's team (consisting of numerous members, including Robert Johnson