Welcome to the home of the SSI Model Railway Control System family of products, the closest experience you will get to real railway control systems on your model railway. SSI is developed by professional permanent way, signalling and computer engineers. It runs under all current 32-bit versions of Microsoft windows. Many modellers choose SSI because it meets their needs of: * Highly reallistic level of layout control * Looks and operates like real IECC (Integrated Electronic Control Centre) systems, commonly used across the UK and the World * Full control of turnouts and signalling * Full interlocking support which is highly configurable * Full Entry/Exit (NX) functionality * Simplifies layout wiring and reduces wiring costs * Simple and Easy control of a layout