Catalyst 9800 Wireless Controller
Two hardware devices 9800-80 and 9800-40 function as Wi-Fi AP controllers. These are not Ethernet switches. They are, however, based on UADP ASICs. The software can also run on some Catalyst switches for small installations.
The C9800 runs on Cisco's IOS-XE software while its predecessor runs on AirOS. The former should provide reliability advantages over the latter.