The agreement is expected to be more than £180m over eight years and will replace the previous contract with the technology company Capgemini.
In a statement the council said, ""One clear objective is to enable us to enter into shorter contractual tie-ins with particular suppliers or products. So if, for example, improvements and savings can be made by switching from desktops and laptops to tablet computers, or if a better deal is available with a different mobile provider, then it will be possible to make the move quickly and without paying financial premiums."
The new systems are expected to be ready by May 2014
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