I know Linux is used in supercomputers and in clusters, but that is a miniscule marketsegment in any count. To say that Linux is succesful in the embedded world is not right. The embedded world is gigantic. The most succesful OS of all is in fact Nokias S40. In any count RTOS rules the embedded world with a myriad of OSes, and they are not Linux based. People get the impression that Linux is used 'everywhere' simply because that is the only OS they know except Windows.
The embedded world is gigantic. The most succesful OS of all is in fact Nokias S40.