UEF (file format)

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UEF (Unified Emulator Format) is a compressed, chunk based file format first implemented by the ElectrEm emulator and related tools for the storage of audio tape, ROM, floppy disk and machine state snapshots for the 8bit range of computers manufactured by Acorn Computers Ltd. It was the first format to attempt to concisely reproduce media borne signals rather than simply the data represented by them, the intention being an accurate archive of original media rather than merely a capability to reproduce files stored on them.

The Acorn machines implement the Kansas City standard for tape data encoding and as a result the file format is suitable for creating backups of original media for several non-Acorn machines.