1944 - August 7 – 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 Automatic Sequence Controlled Calculator, was one of the earliest electromechanical computers. It was developed by IBM and Harvard University, under the leadership of Howard Aiken. The Mark I was a massive machine, weighing about 5 tons and measuring 51 feet in length. It used over 750,000 components, including switches, relays, and mechanical counters.

The Mark I was designed to perform complex calculations automatically, using a series of punched paper tapes to control the sequence of operations. It was primarily used for mathematical calculations, such as those needed for military and scientific research during World War II.

The development of the Mark I laid the foundation for the modern digital computer. It demonstrated the feasibility and potential of programmable machines for performing a wide range of tasks, paving the way for the development of more advanced computers in the decades that followed.