For twenty years I've used early church fathers, one device for each letter of the alphabet. So Ambrose, Basil, Clement, Dionysius. When a device is retired, a

For twenty years I've used early church fathers, one device for each letter of the alphabet. So Ambrose, Basil, Clement, Dionysius. When a device is retired, a new device can take that letter of the alphabet with a different name, so Ambrose is replaced by Augustine, for example.