The PDP-9 was instruction compatible with the PDP-4 and − 7, but ran about twice as fast as the − 7 and was intended to be used in larger deployments.

The PDP-7 was the third of Digital's 18-bit machines, with essentially the same instruction set architecture as the PDP-4 and the PDP-9.

Bell was the architect of the PDP-4, and PDP-6.

; PDP-4: Supposed to be a slower, cheaper alternative to the PDP-1, but not commercially successful ; all later 18-bit PDP machines ( 7, 9 and 15 ) were based on its instruction set.

In 1964 DEC introduced its new Flip Chip module design, and used it to re-implement the PDP-4 as the PDP-7.

In November 1962 DEC introduced the $ 65, 000 PDP-4.

The installation at Chalk River, Ontario included an early PDP-4 with a display system and a new PDP-5 as interface to the research reactor instrumentation and control.

; PDP-7: Replacement for the PDP-4 ; DEC's first wire-wrapped machine.

says designing the LINC provided the ideas for DEC's second and third machines, the 18-bit inexpensive follow-on to its first, the PDP-4 and the company's first 12-bit design of its own, the PDP-5, Digital Equipment Corporation would launch the wondrous PDP-8 before it manufactured the first next-generation LINC-compatible computer, the LINC-8 and a combination of the 7400-series chip-based PDP-8 / I and a redesigned LINC, combined as the PDP-12.

In the mornings, I was informed, fluorescent tubes, similar to the one above the counter, illuminated the entire hall.

But on one occasion when I encountered a similar fantasy in a little boy who was my patient I began to understand the uncanny effects of this story.

but both groups were so closely knit that despite individual differences the family life in both cases was remarkably similar in atmosphere if not entirely in content -- the one being definitely Jewish and the other vaguely Christian.

Against Seebohm formidable foes have taken the field, notably F. W. Maitland, whose Domesday Book And Beyond was written expressly for this purpose, and Sir Paul Vinogradoff whose The Growth Of The Manor had a similar aim.

With these and similar tales he was entertaining his English friends, all of whom he was seeing when he was not showing Blackman the sights of London and its environs.

What was missing in the Governor's argument, as in so many similar arguments, was a premise which would enable one to make the ethical leap from what might be militarily desirable to what is right.

The state was confronted with transportation problems similar to those of the individual.

The resulting setup, it was declared, `` would be similar to that which is in successful operation in a number of metropolitan counties as large or larger than Rhode Island ''.

Space was provided for short-time guest medical exhibits, and the Museum collected new accessions of microscopes, medical, surgical, and diagnostic instruments, uniform, and similar items of historical medico-military significance.

For the low-temperature measurements the sample was cooled by a cold nitrogen gas flow method similar to that of Andrew and Eades.

This sample was contained in a cylindrical container similar to that described above.

On the other hand, a similar attack might have been made on City B whose population was known to be lousy.

The mucosa of the jejunum and ileum showed similar changes, and in some areas the submucosa was edematous and contained considerable numbers of neutrophils.

These conjugates Af had much less nonspecific staining than the previous conjugate ( with 50 mg FITC per gram of globulin ) while the specific staining was similar in both cases.

However, a similar privilege was not specifically provided in section 168 for a person acquiring emergency facilities.

On the morning following the Pratt Hall meeting the editor of the Providence Daily Journal wrote that although the meeting was milder and less extreme than those held in other areas for similar purposes, it could have been avoided completely.

It was only after we had responded, with what I fear were similar cliches, that she went into action by questioning our desire for friendship and understanding with a challenge about aggressive and warlike actions by the U.S. Government in Cuba and Laos.

The event was so successful that the Interior Secretary plans to serve as impresario for similar ones from time to time, hoping thereby to add to the cultural enrichment of the Administration.

All the officials on the case seem to have been afflicted with a similar myopia as far as Bridget was concerned, although records in police files contain many reports of servants who have murdered their employers.

The discovery during the Second World War that guar gum was similar to imported locust gum increased its cultivation in western Asia and initiated it in the United States.

The teacher thought it was so successful that she asks: `` Wouldn't it be helpful to all age groups if they could participate in a similar confessional of their fears and worries ''??

Even though this may appear similar to a series of animation drawings, there was no way of viewing the images in motion.

The first PDP-1 was delivered to Bolt, Beranek and Newman in November 1960, and formally accepted the next April.

The PDP-1 was supplied standard with 4096 words of core memory, 18-bits per word, and ran at a basic speed of 100, 000 operations per second.

During construction of the prototype PDP-1, some design work was carried out on a 24-bit PDP-2, and the 36-bit PDP-3.

A more dramatic upgrade to the PDP-1 series was introduced in August 1966, the PDP-9.

The new machine, the first outside the PDP-1 mould, was introduced at WESTCON on 11 August 1963.

" Much of the TMRC's jargon was later imported into early computing culture, because the club started using a DEC PDP-1 and applied its local model railroad slang in this computing context.

Architecturally it was essentially a PDP-1 stretched to 36-bit word width.

The PDP-1 ( Programmed Data Processor-1 ) was the first computer in Digital Equipment Corporation's PDP series and was first produced in 1960.

The PDP-1 was also the original hardware for playing history's first game on a minicomputer, Steve Russell's Spacewar !.

The PDP-1 was built mostly of DEC 1000-series System Building Blocks, using Micro-Alloy and Micro-Alloy-Diffused transistors with a rated switching speed of 5 MHz.

The design of the PDP-1 was based on the pioneering TX-0 computer, designed and built at MIT Lincoln Laboratory.

The first PDP-1 was delivered to Bolt, Beranek and Newman ( BBN ) in November 1960, and formally accepted the next April.

In 1962, DEC donated the engineering prototype PDP-1 to MIT, where it was placed in the room next to its ancestor, the TX-0 computer, which was by then on indefinite loan from Lincoln Laboratory.

PDP-1 # 44 was found in a barn in Wichita, Kansas in 1988, apparently formerly owned by one of the many aviation companies in the area, and rescued for the Digital Historical Collection, also eventually ending up at the CHM.

A typical PDP-1 operating procedure was to output text to punched paper tape using the PDP-1's " high speed " ( 60 character per second ) Teletype model BRPE punch, then to hand carry the tape to a Flexowriter for offline printing.

MIT hackers also used the PDP-1 for playing music in four-part harmony, using some special hardware — four flip-flops directly controlled by the processor ( the audio signal was filtered with simple RC filters ).

At the same meeting, Jack Dennis said Ben Gurley's design for the PDP-1 was influenced by his work on the TX-0 display.

At the museum's PDP-1 restoration celebration in May 2006, Alan Kotok said his Macintosh PowerBook G4 laptop was 10, 000 times faster, came with 100, 000 times the RAM and 500, 000 times the storage, was 1 / 2000 the size, and cost 1 / 100 as much.

In 2011, Bushnell stated that the game was inspired by previous versions of electronic tennis he had played before ; Bushnell played a version on a PDP-1 computer in 1964 while attending college.

DEC's PDP-1 was essentially a collection of TX-0 and TX-2 concepts in a smaller package.

Bolt, Beranek and Newman had a " similar program " and T-Square was developed by Peter Samson and one or more fellow MIT students in 1962, both for the PDP-1.