What a coincidence! I just logged on for the first time in many months, and just happened upon some 3Com disks in my piles of junk.
They're 3½" floppies for EtherLink III ISA card (model 3C509B). hey're labeled "EtherDisk".
One is NetWare, LAN Server, LANtastic drivers. The other is Windows 95 and Windows NT drivers, and 3Com NIC Installation Wizard and Diagnostics.
I have no idea if they're still readable.