Systems and methods for reducing or minimizing post-surgical complications are described. The program guide information may identify a group of programs and specify, for each program, an indicator of set-top boxes tuned to the each program or providing the each program. In addition, the hard disk drive has a first gasket as a first gasket section existing between the top cover and a peripheral wall of the base, and a second gasket as a second gasket section existing between the top cover and the partition wall of the catching chamber. The image capturing apparatus 100 thus selects a Huffman table that assigns a particularly short code to a predictive differential value with a smaller absolute value. Services may enter or exit the environment at will.