Important People
Computers at the Time
Year of Computers
100

What is David Huffman known for?

His Huffman coding.

100

What did the Colossus computer do?

British people used it to decrypt coded German messages during WW2.

100

When was the complex number calculator created?

1940

200

What did Arthur Dickinson do?

He invented the first electronic computer.

200

What were most computers at the time?

Vacuum tubes

200

When was the first bombe created?

1941

300

Who conceived the Harvard Mark 1?

Howard Aiken

300

Who finished the Z3 computer?

Konrad Zuse

300

When was the ABC created?

1942

400

Who decided to work on the Plan Calculus?

Konrad Zuse

400

Were the major models programmable?

Yes

400

When was the Bell Labs Relay Interpolator done?

1943
500

What did Williams Tube do?

He used RAM for computations.

500

What does ABC stand for?

Atanasoff-Berry Computer

500

When was the Harvard Mark 1 completed?

1944