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.
Also see Disk Operating System. MS-DOS (Microsoft Disk Operating System) was the Microsoft-marketed version of the first widely-installed operating system in personal computers. It was essentially the same operating system that Bill Gates's young company developed for IBM as Personal Computer - Disk Operating System (PC-DOS).