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TOPS-10 and System
* TOPS-10 Operating System for PDP-10 36-bit architecture ( True SMP since version 7. 01 )
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 ).
The TOPS-10 Operating System also included User file and Device independence.
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.
* DEC PDP-6 Time-sharing Monitor -> TOPS-10 -> TSS-8, RSTS-11, RSX-11 -> VAX / VMS
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
TOPS-10 was running on the Mars by the summer of 1984, and TOPS-20 by early fall.
The original PDP-10 operating system was simply called " Monitor ", but was later renamed TOPS-10.
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 ).
Known as the DECsystem-10 in the marketplace, the normal operating system was TOPS-10.
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.
As late as the mid 1980s, PIP was still in common use on TOPS-10, TOPS-20 and PDP-11 systems.
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.
Both could run either TOPS-10 or TOPS-20 microcode and thus the corresponding operating system.
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.
* SED, a text editor for the TOPS-10, TOPS-20, and VMS operating systems
's TOPS-10 operating system or on BBN's own TENEX operating system.
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
Tymshare developed TYMCOM-X, derived from TOPS-10 but using a page-based file system like TOPS-20.
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 )

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