While the PDP-5 introduced a lower-cost line, 1963's PDP-6 was intended to take DEC into the mainframe market with a 36-bit machine.

When the Flip Chip packaging allowed the PDP-6 to be re-implemented at a much lower cost, DEC took the opportunity to carry out a similar evolution of their 36-bit design and introduced the PDP-10 in 1968.

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

In 1964 DEC announced the PDP-6.

DEC was initially interested, but soon ( 1966 ) announced they were in fact dropping the PDP-6 and concentrating solely on their smaller 18-bit and new 16-bit lines.

SHRDLU was written in the Micro Planner and Lisp programming language on the DEC PDP-6 computer and a DEC graphics terminal.

The PDP-6 ( Programmed Data Processor-6 ) was a computer model developed by Digital Equipment Corporation ( DEC ) in 1963.

* DEC PDP-6 Serial numbers

** ITS ( MIT's Incompatible Timesharing System for the DEC PDP-6 and PDP-10 )

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

This and other experiences at TMRC, especially the influence of Alan Kotok, who worked at DEC and was the junior partner of the design team for the PDP-6 computer, led Greenblatt to the AI Lab, where he proceeded to become a " hacker's hacker " noted for his programming acumen as described in Steven Levy's Hackers: Heroes of the Computer Revolution, and as acknowledged by Gerald Jay Sussman and Harold Abelson when they said they were fortunate to have been apprentice programmers at the feet of Bill Gosper and Richard Greenblatt

Pseudo terminals were present in the DEC PDP-6 Timesharing Monitor at least as early as 1967, and were used to implement batch processing.

* BBN TENEX -> DEC TOPS-20, Foonly FOONEX, MAXC OS at PARC, Stanford LOTS

The KS10 emulation supports both ITS v. 262 microcode for the final version of KS10 ITS and DEC v. 130 microcode for the final versions of KS TOPS-10 and TOPS-20.

As a matter of policy, DEC did not update PA1050 to support later TOPS-10 additions except where required by DEC software.

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.

** TOPS-10 ( DEC, the name TOPS-10 wasn't adopted until 1970 )

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.

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 ).

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.

** TSS-8 ( DEC for the PDP-8 )

The first version of RSTS ( RSTS-11, Version 1 ) was implemented in 1970 by DEC software engineers that developed the TSS-8 time-sharing operating system for the PDP-8.

In 1973 memory management support was included in RSTS ( now RSTS / E ) for the newer DEC PDP-11 / 40 and PDP-11 / 45 minicomputers ( the PDP-11 / 20 was only supported under RSTS-11 ).

HP BASIC began as BASIC-PLUS, created by DEC for their RSTS-11 operating system and PDP-11 minicomputer.

RSX-11 is a family of real-time operating systems mainly for PDP-11 computers created by Digital Equipment Corporation ( DEC ), common in the late 1970s and early 1980s.

EDT was a text editor that was developed by Digital Equipment Corporation ( DEC ) for use on its PDP-11 series of computers ( including RSX-11, RSTS / E

Other commercial machines that used writable microcode include early Xerox workstations, the DEC VAX 8800 (" Nautilus ") family, and the Symbolics L-and G-machines.

Also known as DEC and using the trademark DIGITAL, its PDP and VAX products were the most successful ( in terms of sales ) minicomputers.

DEC initially started work on Alpha as a way to re-implement their VAX series, but also employed it in a range of high-performance workstations.

The Eclipse family of systems was later introduced with an extended upwardly compatible instruction set, and the MV-series further extended the Eclipse into a 32-bit architecture to compete with the DEC VAX.

Alpha, originally known as Alpha AXP, is a 64-bit reduced instruction set computer ( RISC ) instruction set architecture ( ISA ) developed by Digital Equipment Corporation ( DEC ), designed to replace the 32-bit VAX complex instruction set computer ( CISC ) ISA and its implementations.

DEC management doubted the need to produce a new computer architecture to replace their existing VAX and DECstation lines, and eventually ended the PRISM project in 1988.

A persistent report attributed to DEC insiders suggests the choice of the AXP tag for the processor was made by DEC's legal department, which was still smarting from the VAX trademark fiasco.

By 1986 the system was complete to the point of being able to run on its own on the DEC VAX.

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.

The PDP-10 was eventually eclipsed by the VAX superminicomputer machines ( descendants of the PDP-11 ) when DEC recognized that the PDP-10 and VAX product lines were competing with each other and decided to concentrate its software development effort on the more profitable VAX.

In any case, DEC never entirely migrated its PDP-11 customer base to the VAX.

Carnegie-Mellon University produced a remote-access application called Alto Terminal, that displayed overlapping windows on the Xerox Alto, and made remote hosts ( typically DEC VAX systems running Unix ) responsible for handling window-exposure events and refreshing window contents as necessary.

It was somewhat similar in spirit to ( but not compatible with ) the popular DEC VAX minicomputer instruction set.

System Industries, a third-party provider of DEC compatible equipment, used a 68B09E processor running OS9 in its QIC ( quarter inch cartridge ) tape backup controllers in VAX installations.

Assembler language development at Psion itself was carried out using cross-development tools, including a cross assembler and linker, all of which ran on a DEC VAX.

Before the advent of VLSI devices, TTL integrated circuits were a standard method of construction for the processors of mini-computer and mainframe processors ; such as the DEC VAX and Data General Eclipse, and for equipment such as machine tool numerical controls, printers and video display terminals.

Gosling traces the origins of the approach to his early 1980s graduate student days, when he created a pseudo-code ( p-code ) virtual machine for the lab's DEC VAX computer so that his professor could run programs written in UCSD Pascal.

The main body of the worm could only infect DEC VAX machines running 4BSD, and Sun-3 systems.

POP-11 was at first implemented on a DEC PDP-11 computer in 1976, and was ported to VAX / VMS in 1980.

Although the first commercial sales were for VAX / VMS, from the mid-1980s the main Poplog development work was done on Sun SPARC computers running Solaris, although several different versions were sold, including versions for HP-UX and a 64-bit version of Poplog for DEC Alpha running Digital UNIX.

Later Digital ported it to Ultrix, as well as Apple Macintosh and IBM PC running variants of DOS and Microsoft Windows under the name DEC Pathworks, allowing these systems to connect to DECnet networks of VAX machines as terminal nodes.