The context engine of a context aware platform may comprise a provider manager coupled to context providers and the provider manager may communicate with the context providers using application programming interfaces (API). To optimize the use of system resources, the provider manager may load/unload the context providers based on value of a load field of a hint signal or on prediction values. The context providers is to activate a first set of sensors of the plurality of sensors if the preferred activity level for the first set of sensors is set to activate state in the hint signal. The context providers is to deactivate a second set of sensors of the plurality of sensors if the preferred activity level for the first set of sensors is set to deactivate state in the hint signal.