Computers for domestic use and components thereof including computer-controlled systems, computer program stored on magnetic tape or disc, video system controlled by computer system, magnetic tape and disc non-recorded and/or recorded for computer and/or video systems, in this class, scientific nautical surveying electrical and electronic apparatus and instruments (including wireless) (other than computer system and video system); optical, weighing, measuring, signalling, checking (supervision), and teaching apparatus and instruments; talking machines; calculating machines; fire extinguishing apparatus.