Remington Rand 409

The Remington Rand 409, a punched card calculator which was programmed with a plugboard, was designed in 1949.

[1] The machine was designed in "The Barn", at 33 Highland Ave. in Rowayton, Connecticut, a building that currently houses the Rowayton Public Library and Community Center.

Numbers were fixed-point and of variable length (one to ten digits).

Digits are represented in bi-quinary coded decimal.

Each digit of memory storage contained five tubes.