Rockwell 920, 930, or 940 Desktop Calculator
Rockwell 940 (Financial)
Image Courtesy Gerard Timmerman
Mid-1970's vintage programmable electronic calculators from Rockwell, using
Rockwell's PPS-4 microprocessor and support chips. Models include 920,
930, 940, and 960. Burroughs Panaplex-II planar display and Epson
Magnetic card reader for program/data storage. 14-digit capacity with
some models supporting scientific notation. Machines all share a common architecture, with variances
in microcode and memory capacity comprising the differences between the models.
Sold in the UK under the Sumlock Anita brand.