A series of mainframe computer
s produced by Unisys
when they were still Sperry Corporation
The Series 1100 bravely went where (almost) nobody else did, with a 36 bit word format. The advantage over
the more conventional format of 32 bits is that one word was large enough to hold all instructions, complete
with modifiers such as indirection and index incrementation flags, and 16 to 18 bits worth of address
or constant data information.
Hardware-wise, the 1100s were based on emitter coupled logic (ECL).
These machines were popular with airlines, banks and other outfits with the need to process large amounts
of data quickly. Some places that I know of which used Series 1100s are: The University of Maryland, the
University of Karlsruhe, the Schweizer Bankgesellschaft, Otto-Versand Hamburg, and Lufthansa.
After Sperry became Unisys, this series was renamed to Unisys 2200.