On the left of the diagram is a group of three server icons, with a database cylinder sitting next to each server. This group is labeled "Protected Databases." This group points to a Recovery Appliance icon. The arrow is labeled "Delta Push." Emerging from the Recovery Appliance icon is a blue icon that looks like an upright door, which is labeled "Delta Store." Within this door is a stack of three translucent database icons, labeled (top to bottom) "Incremental Backup from Two Days Ago," "Incremental Backup from Yesterday," and "Incremental Backup from Today." Within each icon is an icon that looks like a chess board, with random squares filled with black or white.