Isolinear circuitry became the basis for much of the computer technology in the Federation by the 24th century, which replaced the early duotronics circuitry favored in the 23rd century.
Isolinear circuitry employs holographic technology to store data three-dimensionally throughout the medium. (TNG novel: Relics)
In 2372, the USS Samson delivered some state-of-the-art isolinear circuits to the USS Enterprise-E from Starbase 11. (TNG eBook: A Sea of Troubles)