Lot of information on computer about a foot (4)

I believe the answer is:

iamb

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But I can't explain it at all! Could you help me understand?

(Other definitions for iamb that I've seen before include "Line of verse" , "Poet's foot" , "Part of a pentameter?" , "Metrical foot of one short, one long syllables" , "Short-long metrical foot" .)

I've seen this clue in The Independent.

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