The Department for Work and Pensions (DWP) has released a list of its top 100 suppliers for the period 2010 to 2011, detailing how much it spent on different tech vendors.
The figures have been made available following a freedom of information request issued by the Guardian.
The list highlights the fact that the DWP spent less on HP and BT in 2010-11, but more on Atos Origin, when compared with the previous year.
The combined spend on BT and HP was down by over £45m.
However, despite the drop in spend, HP managed to hold on to the number two spot of the DWP's top 100 suppliers with a total spend of over £629m, and BT jumped from fourth place to third with a spend of over £214m.
Atos Origin was the biggest tech climber in the last 12 months, where it jumped from seventh place to fifth and saw its spend increase from over £150m to more than £175m.
Other big tech suppliers to DWP include Serco, which was 10th with a spend of over £86m, Xerox, at 15th with a spend of over £56m, and Computacenter 25th with a spend of over £25m.
Technology companies that feature lower down the list include Cable & Wireless (66th), Ricoh (67th), O2 (89th) and Siemens (97th), all of which had less than £6m spent on them between 2010 and 2011.
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