Original sentence: It is a multi-user, multi-tasking, multi-threaded network operating system.It is among the most famous examples of free software and of open-source development.Linux is a computer operating system and its kernel.The term Linux strictly refers to the Linux kernel, but is commonly used to describe entire Unix-like operating systems (also known as GNU/Linux)
Edited sentence: As developed as other morden operating systems like Microsoft Windows and Mac OS X, it stands out in that all of its underlying source code is open and anyone is free to modify it.Linux is a free computer operating system and its kernel for personal computers.The term Linux strictly refers to only the Linux kernel, but is commonly used to describe entire Unix-like operating systems (also known as GNU/Linux)