How Many Operating Systems Are There?
There are currently six operating systems in use on Earth. They are: Windows, Mac OS X, Linux, Android, iOS and BlackBerry 10. The history of OS can be traced back to the first computer, the Z1, developed in 1956. Later, Bell Labs began developing UNIX, the first multitasking operating system. The Apple series, with its Dos 3.3 operating system, came about in 1977. Microsoft created the first operating system, DOS, in 1981, after purchasing a Seattle-based company that made 86-DOS software....