With the advent of microcomputers, there was a large number of manufacturers entering the home computer market. The ability to network these computers together wouldn't be very useful (or affordable) for home owners, but businesses and education/research establishments may have multiple computers, and a desire to create a local area network.
To this end, which manufacturers designed successful, bespoke networking systems for the microcomputers they were making? A brief description of the systems and their merits would be appreciated.
I'd consider a successful system to be one that was supported on several different machines made by the manufacturer (and possibly other manufacturers' machines) over a period of time.
I'm looking mainly at the 8-bit era computer systems that were aimed at the home/small business market. I'm not looking for networking systems that were also developed for minicomputers and mainframes (such as IBM's Token Ring), just those designed for micros.