Most computer systems use the Microsoft Windows brand of OS. However there are a few good choices for a non-Microsoft OS such as:
Mac OS X A decent operating system with its unique way of performing day to day tasks. In the past (before OS X) it was hard to manage on a network other than a Mac network and is extremely proprietary. You must own a Mac to have Mac OS X (although there are emulators that you can use in windows). I only mention this OS because there is a small open source market for Macs and didn't want to leave them out. You can check out a sampling here to see some of the great open source software available.
Linux - Linux itself is an open source version of the UNIX operating system and created by a Finnish programmer named Linus Torvalds. Linux is implemented in the form of a Distro (short for distribution). There are many versions of Linux but I will only mention a couple here that I think are easy to use and have a lot of support.
Ubuntu is in my opinion the best distro for the non-technical user that I have found. It installs almost as easy as Windows XP/Vista and supports a huge number of hardware types. There is a ton of support for Ubuntu and is still growing. There is specific software written just for Ubuntu as well. Ubuntu comes pre-loaded with most of the software that you will ever need including OpenOffice a free open source office sweet that rivals Microsoft Office. It uses FireFox web browser and has several email clients. It has video and music players, rippers, graphics and so on.
Another thing that is interesting is that you can make or purchase an Ubuntu live CD and run it on your current computer without having to install it. This gives you the chance to test drive it before you commit an asset to it.
Red Hat Linux is probably one of the more well known versions of Linux out there. It has a huge support base and is well documented. RedHat sells service with it's version of Linux. This is how they get around the issue of open source, they sell a service contract and give you the software for free. All in all this isn't a bad thing because it is a very successful OS but sits in that grey area of being truly open source.
Fedora is probably the second most well known version of Linux. Fedora is the foundation for the RedHat Linux and is a true, free open source OS. Like other versions of Linux it is supported and maintained by a large community of programmers and other contributors. The operating system itself is very stable and includes many built in or value added features.
There are many other distributions of Linux and many are also excellent candidates for use at home and the office. However, I cannot describe each and every one. If you want to see many other OS's then just follow this link here or here to see the many others available.
Linux based OS's can be found everywhere from watches to refrigerators, routers to laptops, desktops to servers. Open Source Operating Systems can be a great way to stretch your doller at home or at the office and remain just as productive or in some cases even more productive.
Part 3 coming soon.