The FMAS (in german Flexibles Modulares Ausbildungs-System, or in english ‘flexible and modular training system’) is a 19″-rack I built during my vocational training. It was used in order to learn how to develop modules. First the idea, then schematic, layout and the finished product.
After 2 years a lot of modules kept piling up. I really liked the idea of it and adapted it later to my Arduino Workstation and finally into the ModLab. But for completeness I will present you the glorious FMAS here in detail. The modules are a bit simplistic and outdated but it is good for learning the basics in electronics.