| DAT | a multiplexer that permits two or more data sources to share a common transmission medium |
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| DAT | an item of factual information derived from measurement or research |
| DAT | (computer science) the temporary retention of data in a processor while calculations or logical operations are performed on it |
| DAT | a machine for performing calculations automatically |
| DAT | the rate at which circuits or other devices operate when handling digital information |
| DAT | the organization of data (and its storage allocations in a computer) |
| DAT | system consisting of the network of all communication channels used within an organization |
| DAT | (computer science) one of the circular magnetic paths on a magnetic disk that serve as a guide for writing and reading data |
| DAT | relying on observation or experiment |
| DAT | an organized body of related information |
| DAT | creation and maintenance of a database |
| DAT | a software system that facilitates the creation and maintenance and use of an electronic database |