'''Stream2''' was an operating system extension for the Amstrad CPC released by the german company [[Advanced Software Project]] (Ronald Heitmann and Martin Lancorn) in the middle of the 90ies. It contained a graphical user interface and a new file system called "Prem", which was part of its [[AMSDOS]] replacement "MoDOS". One of the most impressive parts of Stream2 was x-Plain, which was a module for rendering very fast vector-based graphics.
Stream2 was called "operating system", but due to the fact, that it was still based on the CPCs' own operating system, it was rather an extension like GEOS or MS Windows 3.11. The advantage of this concept was, that it is still possible to run smaller [[Locomotive BASIC]] programs and a lot some of the old CPC software.
A big problem for the success of Stream2 was, that it was commercial software and copy-protected. Released in the middle of the 90ies, when most people weren't interested in spending money for CPC software anymore, it hasn't been sold very often.