page_title: IBM 650
hierarchical_section_title: IBM 650
caption_attribution_description: Galego: Ordenador IBM 650, modelo comercializado entre 1954 e 1962. O da fotografía, exposto no Museo Nacional de Ciencia y Tecnología da Coruña, instalouse no Centro de Cálculo da Renfe, en Madrid, en 1959. O prezo do modelo, ó valor actual, equivalería a 5,5 millóns de euros.
context_page_description: The IBM 650 Magnetic Drum Data-Processing Machine is an early digital computer produced by IBM Corporation in the mid-1950s. The first one was installed in late 1954 and it was the most-popular computer for the next 5 years. It was announced in 1953 and in 1956 enhanced as the IBM 650 RAMAC with the addition of up to four disk storage units. Almost 2,000 systems were produced, the last in 1962. Support for the 650 and its component units was withdrawn in 1969.
  The 650 was a two-address, bi-quinary coded decimal computer, with memory on a rotating magnetic drum. Character support was provided by the input/output units converting punched card alphabetical and special character encodings to/from a two-digit decimal code. The 650 was marketed to business, scientific and engineering users as well as to users of punched card machines who were upgrading from calculating punches, such as the IBM 604, to computers. Because of its relatively low cost and ease of programming, the 650 was used to pioneer a wide variety of applications, from modeling submarine crew performance to teaching high school and college students computer programming.
context_section_description: The IBM 650 Magnetic Drum Data-Processing Machine is an early digital computer produced by IBM Corporation in the mid-1950s.  The first one was installed in late 1954 and it was the most-popular computer for the next 5 years. It was announced in 1953 and in 1956 enhanced as the IBM 650 RAMAC with the addition of up to four disk storage units. Almost 2,000 systems were produced, the last in 1962. Support for the 650 and its component units was withdrawn in 1969.
  The 650 was a two-address, bi-quinary coded decimal computer (both data and addresses were decimal), with memory on a rotating magnetic drum.  Character support was provided by the input/output units converting punched card alphabetical and special character encodings to/from a two-digit decimal code. The 650 was marketed to business, scientific and engineering users as well as to users of punched card machines who were upgrading from calculating punches, such as the IBM 604, to computers. Because of its relatively low cost and ease of programming, the 650 was used to pioneer a wide variety of applications, from modeling submarine crew performance to teaching high school and college students computer programming.
caption: Side view of an IBM 650 Console Unit. First computer in Spain (1959) now at National Museum of Science and Technology in A Coruña
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