No. 6: Lenovo
Headquarters: Beijing, China, and Morrisville, N.C.
Snapshot: Lenovo's ThinkServer systems target the SMB market. Lenovo has ambitions to become a bigger player in the server space and has reportedly been in on-and-off talks with IBM to buy a portion of its server business.
Lenovo was founded in 1984 and in 2005 raised its U.S. presence considerably when it purchased IBM's personal computer business and started selling systems under the ThinkPad brand. In the second quarter of 2013, Lenovo overtook HP to become the largest PC maker by unit sales and was the sixth largest server maker by units shipped in 2012, according to IDC.