At, symbol for the element astatine astatine (ăs`tətēn,–tĭn) [Gr.,=unstable], semimetallic radioactive chemical element; symbol At; at. no. 85; at. wt.
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(1) See assistive technology.
(2) (Advanced Technology) IBM's first 286-based PC, introduced in 1984. It was the most advanced machine in the PC line and featured a new keyboard, a higher-capacity 5.25" floppy (1.2MB) and a 16-bit data bus. AT-class machines ran considerably faster than the earlier 8088-based XT PCs. See PC. See also AT keyboard connector.
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| The fastest PC in 1984. Users were amazed at the extraordinary speed of the 286 with its huge 20MB hard disk. (Image courtesy of International Business Machines Corporation. Unauthorized use not permitted.) |
at
a Laotian monetary unit worth one hundredth of a kip.
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(mechanics)
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(chemistry)
| 1. | AT - IBM PC AT | ||
| 2. | (character) | at - commercial at. | |
| 3. | (networking) | at - The country code for Austria. |
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