The Surface runs on an ARM microprocessor, but the upcoming Surface Pro will run on an Intel chip .

FORBES: Microsoft Paradox: Can Windows Be Everywhere and Nowhere at the Same Time?

Concerned about the potential loss of market share in the core PC microprocessor market to ARM-based parts, Sterne Agee analyst Vijay Rakesh this morning cut his rating on Intel shares to Neutral from Buy.

FORBES: Intel: Worried On ARM Threat, Sterne Agee Downgrades

Among the start-ups that have hit it big: Arm, an international microprocessor manufacturer, and CSR, developer of Blutetooth wireless technology.

FORBES: Venture Investing, Euro-Style

Shares of microprocessor IP licensing company ARM Holdings are trading higher Tuesday morning on better-than-expected financial results for the fourth quarter.

FORBES: ARM Holdings Shares Rally As Q4 Results Top Street Ests

Microprocessor technology licensing company ARM Holdings this morning posted Q1 results that topped Street estimates, while projecting full-year results in line with current investor expectations.

FORBES: ARM Holdings Q1 Tops Ests; Sees 2012 In Line With Forecasts

We forecast declines beyond 2012 as we expect that the entry of ARM-based players in PC microprocessor market will fuel price competition.

FORBES: Intel Goes Ivy League, Stock Going Above $30

He means that arm doesn't risk a lot of capital to fabricate chips, preferring instead to license its microprocessor architecture to 35 semiconductor partners.

FORBES: 20 FOR 2000