Real Time Hand Tracking and Gesture Recognition

A data processing network comprises a plurality of client systems and a controlling system operable to issue wake-up requests to the client systems to cause the client systems to issue boot requests onto the network for servicing by a connected server system. The controlling system, which may be embodied in the server system or in a separate system issues the wake-up requests in accordance with a wake-up schedule calculated, for each client, to complete the boot process for that client before a target start-up time when a client user wishes to use the client system.