3Com Corporation was a digital electronics manufacturer best known for its computer network infrastructure products. The company was co-founded in 1979 by Robert Metcalfe, Howard Charney, Bruce Borden, and Greg Shaw. Metcalf has explained that he came up with the name 3Com as a contraction of "Computer Communication Compatibility", with its focus on deploying the Ethernet technology that he had co-invented which enabled the networking of computers.
3Com provided network interface controllers and switches, routers, wireless access points and controllers, IP voice systems, and intrusion prevention systems. The company was based in Massachusetts, USA. From its 2007 acquisition of 100 percent ownership of H3C Technologies Co., Limited (H3C) -initially a joint venture with China-based Huawei Technologies-3Com achieved a leading market presence in China, and a significant networking market share in Europe, Asia, and the Americas 3Com products were sold under the brands 3Com, H3C, and TippingPoint.
On April 12, 2010, Hewlett-Packard completed the acquisition of 3Com.
Since the HP acquisition, 3Com has been fully absorbed by HP and no longer exists as a separate entity.