The instruments and detectors on all three telescopes are designed to be controlled from minicomputers running under the ADAM environment, which has also been adopted as a standard by Starlink, UKIRT, JCMT and the AAT. Note however that the implementations of this system on La Palma differ considerably between telescopes. The INT and JKT and their instruments are controlled by Perkin-Elmer 32-bit computers, whilst the WHT uses DEC Vax machines.