Multi-tasking means that a computer user can have more than one programme or application open at a time, and switch easily between them. Microsoft's Windows and Apple System 7.5 are multi-tasking operating systems.

Dr Ju Gosling aka ju90's ABNORMAL: How Britain became body dysphoric and the key to a cure is available now for just 3.09 for the Kindle or in a limited-edition hardback with full-colour art plates for 20 inc UK postage and packing. Book cover