UNIVAC 418

It evolved from the Control Unit Tester (CUT), a device used in the factory to test peripherals for larger systems.

The TRIM assembly source code used octal numbers as opposed to more common hexadecimal[citation needed] because the 18-bit words are evenly divisible by 3, but not by 4.

The machine had the following addressable registers: All register values were displayed in real time on the front panel of the computer in binary, with the ability of the user to enter new values via push button (a function that was safe to perform only when the computer was not in run mode).

New instructions were added for floating-point arithmetic, binary-to-decimal and decimal-to-binary conversions, and block transfers up to 64 words.

The 418-III had two unique hardware features which enabled it to handle continuously high-speed serial character streams.