Aspects of the present invention are related to systems and methods for parallel video encoding and decoding. Alternatively or additionally, electron focusing can be appropriately made more concentrated by implementing each electron-emissive region as two or more portions 54A-54F) situated suitably with respect to openings in an electron-focusing system. The combination of the parent document and subdocument is referred to as a compound document. text that is visually nearest the field. The system may include a manual or an automated positioning system for one or both of the speakers. The data storage module receives, stores, and provides access to historical claim data.