the first OS was made by Microsoft called MS-DOS, released in July of 1981.
first in first out
Mac OS is the first operating system developed in the year 1955
I have a Mac OS X but I know Mac OS is a computer made by the brand/company, Apple.
Mac OS Leopard
android
everything os made from nature
what are houses made out os in italy
Apple made first use of the sidebar in its computing operating system called "Mac OS". The original version of this operating system was introduced in 1984 and was termed "System".
Macintosh OS X Tiger is an OS (Operating System) made by Apple. Mac OS X Tiger has nothing to do with tigers. The purpose of an OS is to run programmes on a computer.
XP
windows 95.
Probably the IBM 7090 in 1958 running IBSYS. IBSYS was originally developed on the IBM 709, but when it was introduced in 1956 of course it had no OS at all. Programs were all loaded and run manually.