Sci-Tech History

Publishes “Notes” on Babbage’s Analytical Engine.

• Ada, Countess of

  Lovelace

• Charles Babbage

• William Hewlett

• Claude Shannon

Publishes “On Computable Numbers,” describing a universal computer in 1937

• Alan Turing

• Ada, Countess of

  Lovelace

• John Vincent Atanasoff

• John Mauchly

Finishes model of electronic computer with mechanical storage drums in 1939

• George Boole

• John Vincent Atanasoff

• Claude Shannon

• Konrad Zuse

Completes Z3, a fully functional electromechanical programmable digital computer.

• Vannevar Bush

• Tommy Flowers

• John Mauchly

• Konrad Zuse

Pioneers use of vacuum tubes as on-off switches in circuits in 1935.

• Howard Aiken

• Tommy Flowers

• Konrad Zuse

• Herman Hollerith

Proposes a calculator using an electric circuit in 1937

• Bell Labs’ George Stibitz

• John Mauchly

• Vannevar Bush

• John Vincent Atanasoff

Puts together concepts for an electronic computer during a long December night’s drive 1937

• Ada Lovelace
• Charles Babbage
• John Vincent Atanasoff

• Alan Turing

Creates a system using algebra for logical reasoning in 1947

• Ada Lovelace
• John von Neumann
• George Boole
• Alan Turing

Who arrived at Bletchley Park to work on breaking German codes in 1939

• Isaac Newton
• C.S. Lewis
• Alan Turing
• Winston Churchill

Proposes construction of large digital computer and discovers parts of Babbage’s Difference

Engine at Harvard in 1937.

• Howard Aiken
• John von Neumann
• Alan Turing
• Charles Babbage