Duotronics

Duotronics was a form of 23rd century computer technology designed by the Federation Doctor Richard Daystrom in 2243. It succeeded circuitry that used components such as resistors and transistors. 

The technology was used aboard starships in the mid-23rd century, including the USS Enterprise (NCC-1701), in such systems as the ship's sensor array. Daystrom's achievements with this system ultimately earned him the Nobel and Zee-Magnees Prizes. 

In 2268, Daystrom developed a new multitronic system which was to supersede the older duotronic system. However, tests for the new M-5 computer failed and the duotronic system remained. 

Possessing knowledge no more current than the late 23rd century technology, Ard'rian McKenzie thought that perhaps Data possessed a duotronic brain. He in fact had a positronic brain. Within the Federation, Duotronic systems were ultimately replaced by isolinear circuitry in the 24th century. 

Other cultures still utilized duotronic-based technology during the 2370s. The Druoda incorporated duotronic systems in their Series 5 long-range tactical armor unit. When one was discovered by the crew of the USS Voyager, it attempted to communicate with The Doctor using duotronic algorithms. 

Related link

 * Duotronic probe

Duotronik Computer