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(1) Short for data access objects, objects that work with the Jet database engine. DAO objects are generally created with Visual Basic. Once created, a DAO object can be accessed and manipulated by any application that can use the Jet engine. This includes all of the applications in Microsoft Office, such as MS-Word, MS-Access, and Excel.

(2) Short for disk at once, a method of recording to CD-R disks in which all data is written in a single session.

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