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Signature file may refer to:
- A File signature identifies a file or verifies the content of a file (e.g. checksum). The signature can identify a file from within the file or be kept in a separate file or database.
- In document retrieval the signature file method competes with the inverted index method to produce query results.
- A signature block, or sig file is a block of text automatically appended at the bottom of an email message.
- Digital signature
- Electronic signature
| disambiguation page lists articles associated with the title Signature file.
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