Western Digital

When it comes to data storage, Western Digital has drive. The company is one of the largest independent makers of hard disk drives, which record, store, and recall volumes of data. Drives for personal computers account for most of Western Digital's sales, although the company also makes devices for entry-level servers and home entertainment products, such as set-top boxes and video game consoles. The company sells to manufacturers and through retailers and distributors. About half of the its sales are to manufacturers; Dell accounted for 10% of sales in fiscal 2007.

Nvidia

NVIDIA keeps staging new graphics chip invasions. The fabless semiconductor company designs high-definition 2-D and 3-D graphics processors for gaming and industrial-design applications. Its graphics chips, especially the flagship GeForce line, are used by major PC makers, such as Apple, Dell, Gateway, and Hewlett-Packard, as well as in add-in boards and motherboards produced by Asustek Computer (12% of sales) and other companies.