MPlayer which is a free media player, can run on most major operating systems, including Microsoft Windows, Mac OS X, Linux and other Unix-like systems.
Unix is one of the operating systems that split into two line only to merge again later. CP/M is another one of the operating systems as well.
UNIX and CP/M
In this day and age, it would be quite difficult to create an operating system. In 1980, when personal computers came as kits, it was easy to unassemble the operating system, CP/M, and then create your own operating system. This was done and different companies used competing operating systems. Three operating systems now exist, Microsoft, Linux, and UNIX. They are far, far more complex than CP/M. It would be possible to get a copy of CP/M and study the code. You could make a computer start and stop. You could make it do a few simple things. You could not begin to create an operating system to compete with one of the big three.
babe Ruth
M-Systems was created in 1989.
Assuming that we are only talking about the personal computer (PC) market, before Microsoft's Windows operating systems, Microsoft's Disk operating system, or DOS, was used. Before that, CP/M was a popular computer operating system.
Thomas M Schultheis has written: 'Hard copy plotter/printer for the CDC6400 user-oriented data reduction system' -- subject(s): Operating systems (Computers), Computer programs
Robert M. Albrecht has written: 'Basic Self-Teaching' 'Stepping up to OS/2 2.0' -- subject(s): MS OS/2 (Computer file), Operating systems (Computers)
DOS stands for Disk Operating System. It refers to several related operating systems in the late 1900s. Examples include M-DOS, PC-DOS, and MS-DOS. See http://en.wikipedia.org/wiki/Dos.
IBP bought H and M Food Systems
In Microsoft operating systems, the letter C is typically used to indicate the first hard-disk based partition, and typically represents the boot drive. Letters A and B were, historically, allocated to floppy disk drives, while letters C and above are allocated to all other drives and their partitions. Note this is convention, not a requirement. It is possible (but unusual) to change the drive letters in a Windows operating system such that Z, for example, represents the same boot drive. Also note that the habit of allocating letters to different drives is a characteristic of some operating systems (such as CP/M, MS-DOS, and subsequently the Windows family of operating systems). Other operating systems, including the group of Unix (Linux) operating systems, have no notion of a drive letter, but integrate different "drives" into one folder hierarchy. Modern versions of Windows support a similar approach, but this method is not widely used.
m can cause from not operating the computer at the recommended height