IBM dedicates the first program-controlled calculator, the Automatic Sequence Controlled Calculator (known best as the Harvard Mark I)

The Harvard Mark I, also known as the IBM Automatic Sequence Controlled Calculator (ASCC), was an early electromechanical computer developed during World War II.

Development: The project was initiated by Professor Howard Aiken of Harvard University in collaboration with IBM.

Construction and Funding: IBM funded the construction of the Mark I, which was completed in 1944.

Operation: The Harvard Mark I was a large machine, measuring about 51 feet in length and 8 feet in height. It consisted of approximately 750,000 components, including switches, relays, rotating shafts, and clutches.

Capabilities: It could perform a variety of arithmetic operations such as addition, subtraction, multiplication, and division. It was also capable of handling more complex calculations such as trigonometric functions, logarithms, and exponential functions.

Programming: The Mark I was programmed using punched paper tape, which contained sequences of instructions.

Speed: It was relatively slow compared to modern computers, with a multiplication operation taking about 6 seconds to complete.

Significance: The Harvard Mark I was significant for its use in various wartime applications, including ballistic calculations for the U.S. Navy. It represented a major step forward in the development of automatic computing machinery and paved the way for future advances in computer technology.