'backend' originates from the combination of 'back' and 'end', where 'back' meant 'the rear part' and 'end' meant 'the final part'.

'backend' evolved from the concept of the 'back' part of a system, which was not directly visible or accessible to users, and eventually became a term used in computing and technology.

Initially, it referred to the rear part of any system, but over time it evolved into its current meaning of the non-visible part of a computer system responsible for data processing.