IBM 650 Console Unit

IBM 655 Power Unit and IBM 533 & 537 Card Read Punches

Watson in office

IBM 650 Console Unit, IBM 655 Power Unit, and IBM 533 & IBM 537 Card Read Punches

This "white room" view of a 650 installation shows an IBM 533 Card Read Punch in the foreground at left; the 650 Console Unit at center, with an IBM 655 Power Unit behind it; and an IBM 537 Card Read Punch at right. The 537 could process 155 cards a minute.