IT Historical Resource Sites

Listing of sites in our IT Historical Resource Database sorted alphabetically by Institution

Tools for Thought

The idea that people could use computers to amplify thought and communication, as tools for intellectual work and social activity, was not an invention of the mainstream computer industry or orthodox computer science, nor even homebrew computerists;...

Top 10 Most Popular Programming Languages

There are hundreds of programming languages in use today. How can you know which one to learn first? How do you know which ones are the best for your IT field of choice? Well, I can't answer that question for you. But why not start by learning one...

TOP500 : Ranking of Supercomputers according to the LINPACK benchmark

The TOP500 project ranks and details the 500 (non-distributed) most powerful known computer systems in the world. The project was started in 1993 and publishes an updated list of the supercomputers twice a year. The first of these updates always...

Topeka Computing Museum, The

Topeka Computing Museum located at 7th & Jackson, downtown Topeka KS in the Jayhawk Hotel, Theatre area.


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. TOPS-10 evolved from the earlier "Monitor"...


The TOPS-20 operating system by Digital Equipment Corporation (DEC) was the second proprietary OS for the PDP-10 mainframe computer. TOPS-20 began in 1969 as the TENEX operating system of Bolt, Beranek and Newman (BBN). TOPS-20 is almost entirely...

Tor (Anonymity Network)

Tor (short for The Onion Router) is a system intended to enable online anonymity. Tor client software routes Internet traffic through a worldwide volunteer network of servers in order to conceal a user's location or usage from someone conducting...

Torch Computers

Torch Computers Ltd was a computer hardware company formed in 1982 in Great Shelford, near Cambridge, UK and became well known for its computer peripherals for the BBC Micro. Torch produced several second processor units for the BBC Micro with...

Torpedo Data Computer

The Torpedo Data Computer (TDC) was an early electromechanical analog computer used for torpedo fire-control on American submarines during World War II (see Figure 1). Britain, Germany, and Japan also developed automated torpedo fire control...

Total share: 30 years of personal computer market share figures

Electronic digital computers moved out of science fiction and into reality during World War II. Less powerful than a modern pocket calculator, the first real job for these massive machines was to speed up the calculation of artillery firing tables....

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