One processor controls and records the standard leakage of spontaneous nystagmus and the rotatory and caloric tests in three laboratories. It cyclicly scans the horizontal and vertical electronystagmographic leakage from all rooms and it stores the results of its measurement on to a magnetic disk. If these data are to be archived, the computer first calls for the patients's records and then it transfers the test data from the magnetic disk on to an analogous magnetic tape with a tenfold reduction of the time interval. A 3,600-feet-long magnetic tape contains the results of test measurements for a total of 256 h, corresponding to 800-1,000 vestibular tests. With the computer, it is possible to introduce modifications of all vestibular tests, to stop a test at any time, or to plot an electronystagmogram on a curve tracer.