I like both the idea and realization of Wikipedia. As a pensioned associated professor of theoretical physics, Faculty of Mathematics and Physics, Charles University in Prague, CZ, and expert in ISO, IEC and DIN, I hope I can contribute well to the corresponding topics. Now, I am chairman of IEC Technical committee 25 Quantities and units; in this topic, it is quite a lot to do.
In Wiki, I am newcomer and need some time and practise to get experiences.