I've found the following "gem" in the Catalyst 3000 LANE module data sheet:
The module "provides legacy LANs with access to ATM-based services in an ATM campus backbone".
The legacy LAN was switched Ethernet (which is still around after 15 years) and ATM campus backbones have joined the dinosaurs.
In case you've never seen a Catalyst 3000: it was a switch that Cisco got through one of its first acquisitions and although it was a good Ethernet switch, it was a nightmare to configure and the later additions (for example, the LANE module) were a disaster. Luckily, it was allowed to die a quiet death a few years later.