No. 4: NVIDIA (NVDA)
It has gained market share from rival ATI Technologies (ATYT) by making graphics chips that help PCs and Macs run the hottest, fastest games. Now it's expanding into a new niche--providing chips for Microsoft's Xbox game console.
No. 38: KEMET ELECTRONICS (KEM)
By focusing on the two most popular varieties of capacitors, which regulate the flow of electricity on everything from cell phones to the Patriot missile, Kemet has won the business of the world's 35 largest electronics makers.
No. 59: BROCADE COMMUNICATIONS SYSTEMS (BRCD)
The economic slowdown has barely dented the market for storage devices that are linked, and Brocade's switches help companies track a flood of data without breaking the bank. The result: Sales nearly doubled, to $115 million, last quarter.