Trainmaster Command Control
（重定向自TMCC）
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 but not LionChief and LionChief Plus equipped locomotives.