Task: Text Simplification
Input (English): in april 2000 , minix became free / open source software under a permissive free software licence , but by this time other operating systems had surpassed its capabilities , and it remained primarily an operating system for students and hobbyists.
Output (English): although a permissive software licence allowed minix to become a free / open source software in april , 2000 , other systems had by then moved on in capability , and so it became an operating system used mainly by students and hobbyists.