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There were other missteps and false starts. For a time in the late 1980s, 3Com was in the server business. Then there was 3+ Open, the network operating system developed in partnership with Microsoft Corp. A re-branded twin to Microsoft's own OS/2 LAN Manager, 3+ Open was 3Com's bid to compete with Novell Inc. and its ubiquitous NetWare 386. But it was not to be. Microsoft ditched LAN MAN, and 3Com pulled the plug on 3+ Open.
Entire article can be found here.
Source: ComputerWorld