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What is open-source software? Well first, it is NOT what is known as “freeware,” the so-called “free” software which is riddled with pop-ups, ads, and spyware. Open-source software is real software, real operating systems and applications created by real developers, who just want to be able to help each other and users work with their products.

Linux, the first major open-source operating system, was developed by Linus Torvalds in 1992. He wanted to develop a free operating system whose source code was open, that is, available for others to use and modify. After first finding popularity on servers, Linux has been making steady inroads into the desktop computer market. Current supporters of Linux include IBM, Sun Microsystems, Hewlett-Packard, and Novell, as well as the European Union and many of its member states, NASA, and most major universities.

While companies are allowed to develop and sell versions of Linux, they are basically marketing their service and convenience. The “kernel,” or essential source code, of Linux and all open source software is always free.