Remington Rand 409

The Remington Rand 409 was designed in 1949. She was one of the first punch card machines which tubes for storage of intermediate results used. It was built to machine under the name UNIVAC 60 (1952) and UNIVAC 120 ( 1953). The number in the designation reflected the decimal number which stood as a memory.

The production of the UNIVAC 60 and UNIVAC 120 was set in 1962 and the models were replaced by the UNIVAC 1004.

All records of these models were destroyed by Remington Rand,

Architecture

Figures were imaged using fixed-point numbers. The length of the number after the decimal point could take a variable length up to a maximum of 10 points. Arithmetic calculations were handled in floating point and then converted for storage in fixed-point numbers.

Numbers were mapped decimal in bi- Quinary. Each number in the memory was mapped by 5 vacuum tubes, which the states 1,3,5,7 and 9 represented.