But as integrated circuit technology shrank the size and cost of computers in the 1960s and early 1970s, and the memory requirements of AI programs started to exceed the address space of the most common research computer, the DEC PDP-10, researchers considered a new approach: a computer designed specifically to develop and run large artificial intelligence programs, and tailored to the semantics of the Lisp programming language.

Systems Concepts ( now the SC Group ) is a company co-founded by Stewart Nelson and Mike Levitt focused on making hardware products related to the DEC PDP-10 series of computers.

Later, Systems Concepts attempted to produce a compatible replacement for the DEC PDP-10 computers.

While the first such systems were purchased from DEC, when DEC abandoned the PDP-10 architecture in favor of the VAX, CompuServe and other PDP-10 customers began purchasing plug compatible computers from Systems Concepts.

* Living Computer Museum, a portal into the Paul Allen collection of timesharing and interactive computers, including an operational PDP-10 ( KL-10 )

That company adapted the PDP-10 Zork into Zork I-III, a trilogy of games for most popular small computers of the era, including the Apple II, the Commodore 64, the Commodore Plus / 4, the Atari 8-bit family, the TRS-80, CP / M systems and the IBM PC.

Maclisp ran on DEC PDP-6 / 10 computers, initially only on ITS, but later under all the other PDP-10 operating systems.

The company objectives were twofold: to provide in-house computer processing support to Golden United Life Insurance ; and to develop as an independent business in the computer time-sharing industry, by renting time on its PDP-10 midrange computers during business hours.

Creeper infected DEC PDP-10 computers running the TENEX operating system.

* Block-transfer instruction, a machine language instruction for PDP-10 computers

Maclisp itself ran primarily on PDP-6 and PDP-10 computers, but also on the Multics OS and on the Lisp Machine architectures.

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 ".

It eventually was maintained on two dedicated PDP-10 computers, model KL-1090, accessible via the Tymnet Packet Network as Tymshare hosts 23 and 26.

For example, the Data General Nova minicomputer, and the Texas Instruments TMS9900 and National Semiconductor IMP-16 microcomputers used 16 bit words, and there were many 36-bit mainframe computers ( e. g., PDP-10 ) which used 18-bit word addressing, not byte addressing, giving an address space of 2 < sup > 18 </ sup > 36-bit words, approximately 1 megabyte of storage.

| 36 bits – size of word on Univac 1100-series computers and Digital Equipment Corporation's PDP-10

On some computers, the registers were regarded as occupying the first 8 or 16 words of memory ( e. g. ICL 1900, DEC PDP-10 ).

IMP compilers were developed for the CDC-6600, Cray, PDP-10 and PDP-11 computers.

DECtape, originally called " Microtape ", was a magnetic tape data storage medium used with many Digital Equipment Corporation computers, including the PDP-6, PDP-8, LINC-8, PDP-10, PDP-11, PDP-12, and the PDP-15.

The clients ran on Imlacs which had 50 kbit / s serial connections allowing them to communicate with PDP-10 computers running MIT's Incompatible Timesharing System ( ITS ).

* Star Trek ( text game ) ( 1971 ), on PDP-10 computers

* Star Trek ( Script Game ) ( 1972 ), on PDP-10 computers

ITS ran on PDP-6 and, later, PDP-10 computers.

Dungeon was one of the earliest role-playing video games, running on PDP-10 mainframe computers manufactured by Digital Equipment Corporation.

The PDP-10 machine AI at MIT, which was running the ITS operating system and which was connected to the Arpanet, provided an early hacker meeting point.

Over time, some PDP-10 operators began running operating systems assembled from major components developed outside DEC. For example, the main Scheduler might come from one university, the Disk Service from another, and so on.

The DECSYSTEM-20 was a 36-bit Digital Equipment Corporation PDP-10 mainframe computer running the TOPS-20 operating system.

Later on, those systems running TOPS-20 ( on the KL10 PDP-10 processors ) were labeled DECSYSTEM-20 ( the block capitals being the result of a lawsuit brought against DEC by Singer, which once made a computer called " system-10 ").

Digital never made a PDP-20, although the term was sometimes used for a PDP-10 running TOPS-20 ( officially known as a DECSYSTEM-20 ).

Later MATHLAB was made available to users on PDP-6 and PDP-10 Systems running TOPS-10 or TENEX in universities.

The Altair BASIC interpreter was developed by Microsoft founders Paul Allen and Bill Gates with help from Monte Davidoff, using a self made Intel 8080 software simulator running on a PDP-10 minicomputer.

OS / 8's CCL was directly patterned after the CCL found on Digital's PDP-10 systems running TOPS-10.

Crowther / Woods Adventure ( 1977 ) running on a PDP-10

It required about 60k words ( nearly 300kB ) of core memory, which was a significant amount for PDP-10 / KA systems running with only 128k words.

Interlisp development began in 1967 at Bolt, Beranek and Newman in Cambridge, Massachusetts as BBN LISP, which ran on PDP-10 machines running the TENEX operating system.

Mark Crispin seems to claim Digital's name for the color was Terracotta, at least in the context of PDP-10 machines running Tops-20.

Later versions were implemented for CTL Modular One, PDP-10, ICL 1900 series ( running the George operating system ).

Julian Davies, in Edinburgh, implemented an extended version of POP-2, which he called POP-10 on the PDP-10 computer running TOPS-10.

TELCOMP II was implemented on the PDP-7 and TELCOMP III on the PDP-10, running on DEC

Other versions of Runoff were developed for various computer systems including Digital Equipment Corporation's PDP-11 minicomputer systems running RT-11, RSTS / E, RSX on Digital's PDP-10 and for OpenVMS on VAX minicomputers, as well as Sperry Unisys Univac 90 / 60 mainframe using the EDT text editor under the VS / 9 operating system.

The original PDP-10 operating system was simply called " Monitor ", but was later renamed TOPS-10.

* TOPS-10 Operating System for PDP-10 36-bit architecture ( True SMP since version 7. 01 )

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-20 was preferred by most PDP-10 users over TOPS-10 ( at least by those who were not ITS or WAITS partisans ).

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 ( SAIL, Stanford Artificial Intelligence Laboratory, time-sharing system for DEC PDP-6 and PDP-10, later TOPS-10 )

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 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.

They are described in the documentation for the succeeding TOPS-10 on the PDP-10.

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.

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 ).