1 Become a volunteer fireman. 2  You will still have to meet the basic requirements of being a fireman, but won't be compensated for your efforts. 3  If you're already doing this, it will make it easier for you to get hired as a fireman, but if this is your career goal, you should want to be a salaried employee.
Computers using a Windows operating system have a Windows flag/Start icon in the lower left corner of the screen. Computers using a Macintosh operating system have an Apple icon in the upper left corner of the computer screen.
Examples of Operating Systems. There are many different operating systems. Each do the same thing: they control all input, processing and output. Click on the links to see examples of the desktop for the operating systems listed. These examples open in their own window. Click the X in the upper-right corner of the window to return to this page. DOS - Disk Operating System - one of the first operating systems for the personal computer.