Disclosed is a computer having a plurality of adapter cards which are insertable in adjacent bus segments, which are routed interleaved in the middle of a backplane and standard connectors are provided with connections alternating between the two bus segments. Both bus segments are connected to each other by a bridge circuit which includes at least one CPU adapter card. The invention is characterized by two bridge members each of which has an I/O unit and a CPU unit which are fixedly connected to each other. They are insertable in the bus segments with the I/O units inserted in one bus segment and the CPU units inserted in the other bus segment.
