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The operating system history
Nothing can happen on a computer without an operating system. As the interface that allows users to communicate with the computer and managing all the functions and resources of the computer, nothing could be more important than the operating system.
Older mainframe systems often used operations that were developed at IBM System/360 (or OS/360). The OS/360 pioneered a number of concepts that are still visible in modern operating systems, some applications written for OS/360 can still be used in modern machines. A concept that was unique in the system was the fact that once a program is started, the system would a record of all available resources, including storage, locks, data files and so on. When the process was terminated, the resources would all claimed by the operating system.
For batch processing, Control Data Corporation developed the Scope operating system (in the 1960s) and KRONOS NOS systems and further in the 70s. They were descendants of archaic core system, which offered early progress and shared-time programming languages. next logical step was data control PLATO operating system (in conjunction with the University of Illinois). Plato used plasma panel displays and large networks distance, and revolutionary advances as they chat in real time and multi-user games.
Other operating system was the system in early Burroughs MCP, written a high-level language (ESPOL). CCM (dating back to 1961) offered the first practical illustration of virtual memory. MCP is still in use today in the Unisys line ClearPath computers.
The huge front-end investment for the first computers were forced to proceed the development of compatible operating systems, so that partly explains why some of these old mainframe operating systems are still in use.
One of the first operating system for "micro" disk was based on CP / M, which was modeled closely to MS-DOS, the modern operating system for IBM PC. IBM's main competition that came along in the 1980s was of course, Apple Macintosh and Mac OS. With the advent of the Intel 386 chip, personal computers were soon able to multi-task operating systems, something that used be restricted to large-frame machines. 32-bit architecture of the chip paved the way for Microsoft to develop Windows NT OS and MAC OS X. Apple Over time, next operating system would emerge Linux, a descendant of Unix and Minix systems. Linux could open the door to open source revolution as it was distributed free to users, such as FreeBSD, NetBSD and OpenBSD. These developments would evolve into what we know and we assume that modern PC systems.
Today, Microsoft Windows OS still dominates a large portion of the market for professionals, but each one of modern methods has its strengths and weaknesses. But regardless of operating system, all face the same tasks:
Memory management
Dual operation mode (supervisor mode protected mode)
Virtual memory
Process management
Kernel priority right
File Management
Device drivers
Security
Networks
Support File System
About the Author
Ryan Smith, Director of Product Development, Avanquest Software, a global developer and leading publisher in more than 100 countries, providing consumers and businesses with award-winning software for Windows utilities, office productivity, mobility and multimedia.
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