Transforming Lives. 
Inventing the Future.
Operating Systems
If you are reading this, you are probably using an operating system. It is basically the intermediate layer between user programs and the hardware. Not too long ago, operating systems allowed any program to be able to communicate directly with the hardware. Of course, soon it was realized this was not a very good idea, any malicious programmer with some knowledge could wreak havoc on the system. Modern operating systems control what functions a program can and can not perform. The separation between the application programs and hardware provides for safer computer systems. Also, operating systems allow developers to develop programs for just a few operating systems, instead of for hundreds of thousands of hardware platforms.
An operating system is an integral part of modern computers. It is often the most complex piece of software. Keeping things running flawlessly is the main goal of any OS. Operating systems now are more stable than before and more user friendly. Some popular operating systems are Windows, Unix, Linux, and Macintosh.
Operating System Guide #1 - Please read the first 5 sections of this easy to read guide, which includes many diagrams and picture. There are also self-assessment questions at the end of every section for review.
Operating Systems Guide #2 - Easy to comprehend with lots of visualization.
