A processor for sequentially executing a plurality of programs using a plurality of register value groups stored in a memory that correspond one-to-one with the programs. In one embodiment, the emergency starting apparatus includes a fuel cell starter, such as a piezoelectric element, as an integrated fuel cell starter. 36 gcm3 is brought into contact sequentially with a heater group having a surface temperature TH of 240\xb0 C. Otherwise, the single lockout prevents firing when the staple cartridge is missing or spent. The outer ring has, at the axial end of the outer ring, a flange radially pointing away from the rotation axis. In addition, since a progressive bitstream is generated, 3D volume data can be shown progressively when decoding is performed.