Is This a system?Why? EOS Digital Computers PictBridge Cameras Compatible with Direct Print Printers PC Card Adapter (with Direct Print) H回- CF/SD*Card EOS-1Ds Mark ll PC Compatible Reader Computer EOS-1D Mark ll CF/SD*Cards Inkjet Phato Printer 丙如可用 Macintosn 图时 E0520D USB Cable Computer USB Cable (FireWire IFC-200D4/ D440r1fC-450D4/D44 cable for EOS 1Ds Markll and EOS 1D Mark l) EOS Digital Rebel XT USB Cable Hm C图H Compact Interface Cable Photo Printer IFC-300PCU/IFC-400PCU (EOS-1Ds Mark ll,1D Mark ll,20D, EOS Digital Rebel Digital Rebel XT.Digital Rebel CLGO System Engineering by J.J.Gao 11+ Is This a system? Why? - a system? Why? System Engineering by J. J. Gao 11