pronuciation of data

[Dorothy Simmons]

is data pronouced with a long A or a short a?

[Tdol]

I'm afraid there's no clear answer; different dictionaries give different numbers of possible pronunciations. It's a troublesome word; in some fields datum is never used and the noun is uncountable, but in others this usage would be regarded as incorrect.

Cambridge- 2
Merriam-Webster- 3
American Heritage- 3
Oxford- 1
Encarta- 2