Answer :

AL2006
It's short for "intelligence". The phrase means 'collect all information'.
It's a clipped word (back - formation) which means 'intelligence'. In computer language, clipping is a major way of forming new words. Though 'inteligence' is not new, by clipping it gets a new meaning, suchlike 'information' or data. So, 'intel' is 'information' /'data'.

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