Linux, the most widely used open source operating system in the world, has scored a major publicity coup in the revelation that it is used on 94% of the world's top 500 supercomputers.

Every operating system has technical issues and Linux has not been faultless. But some key technological milestones have been passed in recent years that have made it possible for Linux to quietly assert dominance in the fight for popularity and custom.

Apart from the fact that it is free and has been since its creation in 1991 by Linus Torvalds, Linux has many technological advantages that mean other operating systems just can't beat it.

Millions of people all over the world use Microsoft operating systems but how many describe themselves as enthusiasts? Linux users are often really passionate about the open source cause and this is boosting uptake. They argue that it is more secure than main rivals Apple and Microsoft, with technical features that win hands down. The fact that the most powerful and expensive computers in the world are using it is potentially the best reference you could want.