A system for retrieval and aggregation of information resulting from context-based queries includes one or more programmed worklets and a plurality of interconnected computer systems. The computer systems are collectively programmed to model the workflow activities worklets distinct from assistlets to recognize work people perform and to suitably represent such work, generate queries through a meta-querying template that utilize the modeled worklets received from a first processing unit, retrieve information relevant to the work task in response to the queries from a plurality of data sources, and aggregate the retrieved information for presentation to the user.