AT

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At,

symbol for the element astatineastatine
[Gr.,=unstable], semimetallic radioactive chemical element; symbol At; at. no. 85; at. wt. of most stable isotope 210; m.p. 302°C; (estimated); b.p. 337°C; (estimated); density unknown; valence believed to be +1, +3, +5, or +7.
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AT

Abbrev. for Australia Telescope.

at

(mechanics)

At

(chemistry)

AT.

1. Abbr. for asphalt tile.
2. On drawings, abbr. for “airtight.”

at

a Laotian monetary unit worth one hundredth of a kip.

AT

(1)

at

(character)

at

(networking)
The country code for Austria.

AT

(1) See assistive technology.

(2) (Advanced Technology) IBM's first 286-based PC, introduced in 1984. The PC AT 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 286 and AT bus.


IBM PC AT
The fastest PC in 1984. Users were amazed at the extraordinary speed of the 286 with its huge 20MB hard disk. (Image courtesy of IBM.)
References in periodicals archive ?
I look at it like dancehall is a new edition of reggae music that transcends; it's an offshoot of reggae music.
When we did Basic I wanted to do, a scene where the characters would be watching each other while they're going at it.
It means you have to go into the site to look at it.
I don't think at this point it is, and I believe that we're not even going to look at it seriously until well after the year 2000.
We are as Gods and might as well get good at it," he wrote in the 1968 edition of the catalog.