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Graphics Interchange Format  |  1997-01-13  |  78.1 KB  |  430x537  |  4-bit (16 colors)
   ocr: (a) 2 3 + Display APU Umbilical StarAPU Controller Display Crew PayloagStatus Recase Seleci Deploy IMU Umalical StareMU (b) 2 3 Display APU Umbilical StaitAPU Controller Display Crew Payload Status Resase Select Deploy IMU Umbitical StanMU Figure 8: concurrent example ofan actor-event diagram using (a) a plus sign; and (b) an ampersand.