Production
The first three machines were delivered in the northern spring of 1955; in late 1958 a DEUCE Mark II improved model appeared. This version employed a combined card reader and punch. The combined IBM 528 reader and punch behaved like the separate Hollerith units on the earlier DEUCE Mark I machines; however, it was provided with hardware conversion of alphanumeric data to BCD on input, and vice versa on output. Data could also be read in and punched simultaneously at 100 cards per minute. The DEUCE Mark IIA provided seven extra mercury delay lines, each of 32 words.
A total of 33 DEUCE machines were sold between 1955 and 1964.
The success of DEUCE was its program library of over 1000 programs and subroutines.
Read more about this topic: English Electric DEUCE
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