Skip to main content

history of minicomputers operating system

Digital Equipment Corporation created several operating systems for its 16-bitPDP-11 machines, including the simple RT-11 system, the time-sharing RSTSoperating systems, and the RSX-11 family of real-time operating systems, as well as the VMS system for the 32-bit VAX machines.
Several competitors of Digital Equipment Corporation such as Data General,Hewlett-Packard, and Computer Automation created their own operating systems. One such, "MAX III", was developed for Modular Computer SystemsModcomp II and Modcomp III computers. It was characterised by its target market being the industrial control market. The Fortran libraries included one that enabled access to measurement and control devices.
IBM's key innovation in operating systems in this class (which they call "mid-range"), was their "CPF" for the System/38. This had capability-based addressing, used a machine interface architecture to isolate the application software and most of the operating system from hardware dependencies (including even such details as address size and register size) and included an integrated RDBMS. The succeeding OS/400 for the AS/400 has no files, only objects of different types and these objects persist in very large, flat virtual memory, called a single-level store. i5/OS and later IBM i for the iSeriescontinue this line of operating system.
The Unix operating system was developed at AT&T Bell Laboratories in the late 1960s, originally for the PDP-7, and later for the PDP-11. Because it was essentially free in early editions, easily obtainable, and easily modified, it achieved wide acceptance. It also became a requirement within the Bell systems operating companies. Since it was written in the C language, when that language was ported to a new machine architecture, Unix was also able to be ported. This portability permitted it to become the choice for a second generation of minicomputers and the first generation of workstations. By widespread use it exemplified the idea of an operating system that was conceptually the same across various hardware platforms, and later became one of the roots of the free software and open source including GNU, Linux, and the Berkeley Software Distribution. Apple's OS X is also based on Unix viaNeXTSTEP[9] and FreeBSD.[10]
The Pick operating system was another operating system available on a wide variety of hardware brands. Commercially released in 1973 its core was aBASIC-like language called Data/BASIC and a SQL-style database manipulation language called ENGLISH. Licensed to a large variety of manufacturers and vendors, by the early 1980s observers saw the Pick operating system as a strong competitor to Unix.[11]

Comments

Post a Comment

Popular posts from this blog

QBasic and its history

QBasic Not to be confused with  Quick Basic . QBasic Paradigm Procedural Developer Microsoft First appeared 1991 ; 25 years ago OS MS-DOS ,  Windows 95 ,  Windows 98 ,  Windows Me ,  PC DOS ,  OS/2 , eComStation License Part of the operating system (a variety of  closed-source  licenses) Website www .microsoft .com Influenced by QuickBASIC ,  GW-BASIC Influenced QB64 ,  Small Basic QBasic  ( Microsoft  Quick Beginners All purpose Symbolic Instruction Code ) is an  IDE  and  interpreter  for a variety of the  BASIC programming language  which is based on  QuickBASIC . Code entered into the IDE is compiled to an intermediate representation , and this  IR  is immediately interpreted on demand within the IDE. [1]  It can run under nearly all versions of  DOS  and  Windows , or through  DOSBox / DOSEMU , on  Linux  and...
Post a Comment
Read more

Develop your website

Are you an enterpreneur and want a website to promote your buisness? If yes please choose your catogery so that you can feel easy. I need a attractive website i can invest required ammount I need a simple website and invest less Attractive website I can develop a website that explores everything of your buisness or profession you just need to bive me the detailed information of your buisness and i will evaluate it and decleare price if you agree to pay the work is started and will be completed within a month to 6 month as per expansivity of site  Simple Website I can also develop a simple website which will be informative source of your buisness and some speical features will be mentioned in site Note i will also give you a cms comment if you are intrested
1 comment
Read more

Top 10 keyboard shortcuts everyone should know

Top 10 keyboard shortcuts everyone should know Using keyboard shortcuts can greatly increase your productivity, reduce repetitive strain, and help keep you focused. For example, to copy text, you can highlight text and press the Ctrl + C shortcut. The shortcut is faster than moving your hands from the keyboard, highlighting with the mouse, choosing copy from the file menu, and then returning to the keyboard. Below are the top 10 keyboard shortcuts we recommend everyone memorize and use. Ctrl + C or Ctrl + Insert and Ctrl + X Both  Ctrl + C  and  Ctrl +  Insert  will  copy  the  highlighted  text or selected item. If you want to  cut  instead of copy press  Ctrl + X . Apple  computer users can substitute the Ctrl key for the  command (cmd) key  on their computers. For example, pressing  Cmd + C  copies the highlighted text. Ctrl + V or Shift + Insert Both the  Ctrl + V  and ...
Post a Comment
Read more