The first computers did not have operating systems. By the early 1960s, commercial computer vendors were supplying quite extensive tools for streamlining the development, scheduling, and execution of jobs on batch processing systems. Examples were produced by UNIVAC and Control Data Corporation , amongst others.
Mainframes
Through the 1960s, many major features were pioneered in the field of operating systems. The development of the IBM system/360 produced a family of mainframe computers available in widely differing capacities and price points, for which a single operating system OS/360 was planned (rather than developing ad-hoc programs for every individual model).
Microcomputers
The first microcomputers did not have the capacity or need for the elaborate operating systems that had been developed for mainframes and minis; minimalistic operating systems were developed, often loaded from ROM and known as Monitors. One notable early disk-based operating system was CP/M, which was supported on many early microcomputers and was closely imitated in MS-DOS, which became wildly popular as the operating system chosen for the IBM-PC.
Microsoft Windows
The Microsoft windows family of operating systems originated as an add-on to the older MS-DOS operating system for the IBM-PC Modern versions are based on the newer WindowsNT kernel that was originally intended for OS/2 and borrowed from VMS Windows runs on x86,x86/64 and itanium processors.
Ken Thompson, Dennis Ritchie and Douglas Mcllroy at bell labs designed and developed the C programming language to build the operating system Unix. Programmers at Bell Labs went on to develop plan 9 and inferno , which were engineered for modern distributed environments. Plan 9 was designed from the start to be a networked operating system, and had graphics built-in, unlike Unix, which added these features to the design later.
Unix and Unix-like operating systems
The unix-like family is a diverse group of operating systems, with several major sub-categories including Systemv,BSD, and linux The name "UNIX" is a trademark of the open group which licenses it for use with any operating system that has been shown to conform to their definitions. "Unix-like" is commonly used to refer to the large set of operating systems which resemble the original Unix.
Mac OS X
Mac OS X is a line of proprietary graphical operating systems developed, marketed, and sold by Apple inc., the latest of which is pre-loaded on all currently shipping Machintosh computers. Mac OS X is the successor to the original Mac OS, which had been Apple's primary operating system since 1984. Unlike its predecessor, Mac OS X is a UNIX operating system built on technology that had been developed at NeXT through the second half of the 1980s and up until Apple purchased the company in early 1997.
Windows 95
Windows 95 is a consumer-oriented grasphical-user-interface –basedoperating system . It was released on August 14,1995 by Microsoft , and was a significant progression from the company's previous Windows products. During development it was referred to as Windows 4.0 or by the internal codename Chicago.
Windows 98
Windows 98 (codenamed Memphis) is a graphical operating suystem released on june 25,, 1998 by Microsoft and the successor to Windows 95. Like its predecessor, it is a hybrid 16-bit/ 32-bit monolithic product based on MS-DOS.
Windows XP
Windows XP is a line of operating systems developed by Microsoft for use ongeneral-purpose-computer systems, including home and business desktops, notebook computers, and media centers. The name "XP" stands for eXPerience.
Windows Vista
Windows Vista is a line of operating system developed by microsoft for use on personal computers, including home and business desktops, laptops, tabletpc’s, and media centers Prior to its announcement onjuly 22, 2005, Windows Vista was known by its codename "Longhorn". Development was completed on November 8,2006; over the following three months it was released in stages to computer hardware and software manufacturers, business customers, and retail channels.
On January 30,2007 , it was released worldwide to the general public, and was made available for purchase and downloading from Microsoft's web site.The release of Windows Vista comes more than five years after the introduction of its predecessor, Windows XP, the longest time span between successive releases of Microsoft Windows.