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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe PDP-1 (Programmed Data Processor-1) was Digital Equipment Corporation’s first computer, launched in 1960. An 18-bit interactive machine, it helped bring hands-on computing to organizations beyond the largest research centers—and became the platform for early timesharing, graphics, and the influential game Spacewar!.
What was the PDP-1?
DEC designed the PDP-1 as a computer people could interact with directly, rather than only submit work to in batches. The Computer History Museum describes it as the first commercial interactive computer. That distinction matters: it was not the first computer, but an early commercial machine built for real-time use.
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Engineer Ben Gurley designed the 18-bit system in less than three and a half months. Its development drew on MIT Lincoln Laboratory computers TX-0 and TX-2, as well as DEC’s interconnectable Laboratory Modules. The museum says the PDP-1 descended directly from TX-0 and that Gurley and Dick Best reused many TX-0 circuits. DEC had begun by making modular components such as adders and oscillators; the PDP-1 grew out of that business. The museum’s account of the machine and its history of the design describe this lineage.
A Computer History Museum archival guide records a launch-era price of $120,000 and dimensions of 8 feet by 2 feet by 6 feet. These are historical figures as stated in the guide, not an inflation-adjusted price. The collection guide also documents surviving PDP-1 materials.
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Why did the PDP-1 matter?
Direct interaction changed how people could use a computer. The Computer History Museum says PDP-1 purchasers applied the machines to process control, scientific research, graphics, and pioneering timesharing. Programmers could work with the machine in real time, encouraging experiments in debugging, text editing, music, and games. The PDP-1 helped foreshadow the minicomputer category and the broader access to computing it enabled. The museum’s restoration project introduction discusses these uses.
Its influence was not confined to laboratories. An archival account says Itek bought the second PDP-1 for electronic drafting, which the archive calls the world’s first use of a CAD application. That priority wording is the archive’s claim, rather than a universally established conclusion. DEC gave a PDP-1 to MIT in 1961, where it was used for timesharing and Spacewar!. The collection guide and the archive’s PDP-1 story record these examples.
How did Spacewar! come about?
Spacewar! was created in stages, so credit belongs to several people. Steve Russell, Martin Graetz, and Wayne Wiitanen conceived the game in 1961, drawing in part on E. E. “Doc” Smith’s Lensman stories. Russell wrote its first version. In spring 1962, Peter Samson, Dan Edwards, and Graetz made important improvements. The Computer History Museum’s account of the game describes its development.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesTwo players piloted spaceships in combat against a star field arranged around astronomical ideas, with physics-inspired conditions shaping play. The PDP-1’s flexible input and output supported controllers; a surplus jet-fighter joystick was later used. The game made the computer’s real-time graphics and processing visible in a way that could also serve as a compelling demonstration to prospective customers.
The museum reports that the game required “over 100,000 calculations per second” for ship motion, gravity, player inputs, and celestial positions, while the CPU sent “over 20,000 points per second” to the Type 30 display during play. The museum’s page does not state a publication year for these figures. Its Spacewar! exhibit provides the figures and their context.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What survives, and can you see a PDP-1 running?
The Computer History Museum restored a 1963 PDP-1. Volunteers first powered it on May 19, 2004, and completed the restoration in October 2005. They prioritized reversible work to preserve the machine’s historical integrity, repairing and testing its power supplies, CPU, paper-tape equipment, display and light pen, and typewriter. The team also ran preserved software, including Spacewar!. The restoration account and the software page describe the work.
The museum’s exhibit listing currently schedules PDP-1 and Spacewar! demonstrations on the first and third Saturdays of each month at 2:30 p.m. and 3:15 p.m. Schedules and visitor details can change, so check the official PDP-1 Demo Lab listing before making a trip.
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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →For readers who want to study the machine beyond a demonstration, the museum archive includes program listings, manuals, technical papers, design drawings, photographs, and paper-tape software. Its finding aid describes a 1963 PDP-1 Handbook and manuals on hardware, programming, instructions, and maintenance; the collection guide lists materials spanning 1959–1983. The archive documents historical materials, not current retail availability. Consult the collection guide for the catalog information.
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