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.
That makes Android the most popular operating system that runs on smartphones, while iOS is more used on tablets. In certain categories, one family of operating systems dominates, for example, most desktop and laptop computers use Microsoft Windows, while virtually all supercomputers use Linux. In the servers category, there is more diversity, with Linux and Windows Server most popular, and much fewer mainframes.