back end

noun
1.
(Northern English, dialect) autumn
adjective
2.
(of money, costs, etc) required or incurred after a project has been completed
Word Origin
from the phrase the back end of the year
back-end in Technology

programming
Any software performing either the final stage in a process, or a task not apparent to the user. A common usage is in a compiler. A compiler's back-end generates machine language and performs optimisations specific to the machine's architecture.
The term can also be used in the context of network applications. E.g. "The back-end of the system handles socket protocols".
Contrast front end.
(1996-04-09)