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Digital signatures can be applied to an entire document, such that the digital signature on the last page will indicate tampering if any data on any of the pages have been altered, but this can also be achieved by signing with ink and numbering all pages of the contract.
The word autograph comes from Ancient Greek (αὐτός, autós, "self" and γράφω, gráphō, "write"), and can mean more specifically: [1] [2] a manuscript written by the author of its content. [1] [2] In this meaning the term autograph can often be used interchangeably with holograph. [1] [3] a celebrity's handwritten signature. [2]
.doc (an abbreviation of "document") is a filename extension used for word processing documents stored on Microsoft's proprietary Microsoft Word Binary File Format; it was the primary format for Microsoft Word until the 2007 version replaced it with Office Open XML.docx files. [4] Microsoft has used the extension since 1983.