Uzel was the Soviet Union

Soviet Union

The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

's first digital computer

Computer

A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem...

 used on submarine

Submarine

A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

s, to assist in tracking multiple targets and calculate torpedo solutions. Uzel's design team was headed by two American defectors to the Soviet Union, Alfred Sarant

Alfred Sarant

Alfred Epaminondas Sarant, also known as Filipp Georgievich Staros and Philip Georgievich Staros , was an engineer and a member of the Communist party in New York City in 1944. He was part of the Rosenberg spy ring that reported to Soviet intelligence...

 (aka Philip Staros) and Joel Barr

Joel Barr

Joel Barr , also Iozef Veniaminovich Berg and Joseph Berg, was part of the Soviet Atomic Spy Ring...

 (aka Joseph Berg). An upgraded version of the Uzel computer is still in use on the Kilo class submarine

Kilo class submarine

The Kilo class is the NATO reporting name for a naval diesel-electric submarine that is made in Russia. The original version of the vessels were designated Project 877 Paltus in Russia. There is also a more advanced version, designated as Improved Kilo in the west, and Project 636 Varshavyanka in...

today.