jan 1, 1953 - A-2 system de UNIVAC era entregado con el código fuente a los clientes

Description:

The first example of free and open-source software is believed to be the A-2 system, developed at the UNIVAC division of Remington Rand in 1953,[5] which was released to customers with its source code. They were invited to send their improvements back to UNIVAC.

The A-0 system (Arithmetic Language version 0), written by Grace Murray Hopper in 1951 and 1952 for the UNIVAC I, was an early compiler related tool developed for electronic computers.
The A-0 system was followed by the A-1, A-2, A-3 (released as ARITH-MATIC), AT-3 (released as MATH-MATIC) and B-0 (released as FLOW-MATIC).
The A-2 system was developed at the UNIVAC division of Remington Rand in 1953 and released to customers by the end of that year. Customers were provided the source code for A-2 and invited to send their improvements back to UNIVAC. Thus, A-2 could be considered an example of the result of an early philosophy similar to free and open-source software.

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