The IBM 7040
, a scaled down version of the IBM 7090
introduced by IBM
in April, 1963
, was a later member of the IBM 700/7000 series
of scientific computers. It was not fully compatible with the 7090. Some 7090 features, including index registers, character instructions and floating point, were extra-cost options. It also featured a different input/output architecture, based on the IBM 1414
data synchronizer, allowing more modern IBM peripherals to be used.