Up for sale is a Farallon Ethernet card and driver disk for old Macintosh computers including:
LC, LC II, LC III
LC 575LC 400-500 seriesPerforma 400-500-some 600 series
Or any other Mac with the LC PDS slot on the logic board.This card slides onto the slot easily and gives you network and internet capabilities on your ancient Mac computer!
This is a new old stock item. Getting your ancient Mac on the internet is one heck of a challenge, and this is the first step. [in other words, browsing software is required]
Protip: I have had the most success connecting legacy computers to modern routers by manually inputing an IP address.