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The TOPS-10 System ( Timesharing / Total OPerating System ) was a computer operating system from Digital Equipment Corporation ( DEC ) for the PDP-10 ( or DECsystem-10 ) mainframe computer launched in 1967.
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TOPS-10 and System
This was until a manager at Tymnet wrote a small FORTRAN IV program to maintain a list of problem reports and track their status in a System 1022 database ( a hierarchical database system for TOPS-10 published by Software House ).
Originally written to run on a Burroughs Corporation B6700 Main frame in Fortran IV, subsequently rewritten in SMALL and ported to a DEC PDP-10 Architecture ( on the Operating System TOPS-10 ) and IBM S360 Architecture ( on the Operating System VM / CMS ).
TOPS-10 and /
In large machines there were other disk operating systems, such as IBM's VM, DEC's RSTS / RT-11 / VMS / TOPS-10 / TWENEX, MIT's ITS / CTSS, Control Data's assorted NOS variants, Harris's Vulcan, Bell Labs ' Unix, and so on.
OS / 8's CCL was directly patterned after the CCL found on Digital's PDP-10 systems running TOPS-10.
In fact, much of the OS / 8 software system was deliberately designed to mimic, as closely as possible, the TOPS-10 operating environment.
SYSTAT was also a command on the DEC TOPS-10 and RSTS / E computer operating systems by which one obtained the current general status of the running operating system.
TOPS-10 and was
Most ( but not all ) machines sold to run TOPS-10 were painted " Blasi Blue ", whereas most TOPS-20 machines were painted " Terracotta " ( often mistakenly called " Chinese Red " or orange ; the actual name of the color on the paint cans was Terracotta ).
The TOPS-10 implemented the concept of public, protected, and private member variables and methods, that later was integrated into Simula 87.
Later MATHLAB was made available to users on PDP-6 and PDP-10 Systems running TOPS-10 or TENEX in universities.
Before the widespread use of Unix, TOPS-10 was a particularly popular system in universities, and in the early ARPANET community.
) This usage was influenced by the device prefixes used in Digital Equipment Corporation's TOPS-10 operating system.
TOPS-20 is almost entirely unrelated to the similarly named TOPS-10, but it was shipped with the PA1050 TOPS-10 Monitor Calls emulation facility which allowed most, but not all, TOPS-10 executables to run unchanged.
TOPS-20 was preferred by most PDP-10 users over TOPS-10 ( at least by those who were not ITS or WAITS partisans ).
The main operating system used on the machine was an early version of what later became TOPS-10, and several sites made custom versions of the system, which was available in source code form.
In the TOPS-10 operating system ( for the DEC PDP-10 computer ), the command was used to invoke the TECO editor to create a file ; if given the file name argument, so that the command was, it would pause and respond before creating the file.
WAITS was a heavily-modified variant of Digital Equipment Corporation's Monitor operating system ( later renamed to, and better known as TOPS-10 ) for the PDP-6 and PDP-10 mainframe computers, used at the Stanford Artificial Intelligence Laboratory ( SAIL ) up until 1990 ; the mainframe computer it ran on also went by the name of " SAIL ".
TOPS-10 evolved from the earlier " Monitor " software for the PDP-6 and-10 computers ; this was renamed TOPS-10 in 1970.
TOPS-10 and computer
Digital Equipment Corporation developed many operating systems for its various computer lines, including TOPS-10 and TOPS-20 time sharing systems for the 36-bit PDP-10 class systems.
TOPS-10 supported shared memory and allowed the development of one of the first true multiplayer computer games.
Paul Allen maintains several publicly accessible historic computer systems, including a DECsystem-1090 running TOPS-10.
Julian Davies, in Edinburgh, implemented an extended version of POP-2, which he called POP-10 on the PDP-10 computer running TOPS-10.
Aside from the CAP capability computer the compiler was ported to systems including CMS, TOPS-10 and Z80.
TOPS-10 and operating
However, the PDP-6 is historically important as the platform that introduced " Monitor ", an early time-sharing operating system that would evolve into the widely used TOPS-10.
Early versions of Monitor and TOPS-10 formed the basis of Stanford's WAITS operating system and the Compuserve time-sharing system.
PDP-10 computers running the TOPS-10 operating system were labeled DECsystem-10 as a way of differentiating them from the PDP-11.
In 1978, there were half a dozen different operating systems for the PDP-10: ITS ( MIT ), WAITS ( Stanford ), TOPS-10 ( DEC ), CMU TOPS-10 ( Carnegie Mellon ), TENEX ( BBN ), and TOPS-20 ( DEC, based on TENEX ).
The easiest way for the hobbyist to run TOPS-10 is to acquire a suitable emulator and an operating system image.
In the 1970s, Tymshare, which had used Digital Equipment's operating system TOPS-10 for its PDP-10s, began independent work on the OS for their systems, called it TYMCOM-X, and implemented a file system that supported random access, paging with working sets, and spawnable processes.
Command structure was similar to the command structure of TOPS-10, the operating system for the PDP-10 ; commands could be abbreviated to their most simple and unique form.
TOPS-10 and system
Copies of DEC's original distribution tapes are available as downloads from the Internet so that a running TOPS-10 or TOPS-20 system may be established.
In the end they decided to make a new system, but include an emulation library that would allow it to run existing TOPS-10 software with minor effort.
** WAITS ( SAIL, Stanford Artificial Intelligence Laboratory, time-sharing system for DEC PDP-6 and PDP-10, later TOPS-10 )
0.105 seconds.