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No. 3,435 CTI Burr Ridge, IL

	Year	2008
	Industry	IT Services
	Founded	2001
	Growth	96.4%
	2004 Revenue	$7.8 million
	2007 Revenue	$15.4 million
	Employees	40
	Website	www.cticonnect.com

What it does:
Provides Wireless Broadband (WiMAX) Infrastructure to Internet Service Providers for rural and underserved markets.

Why it's growing:
Demand for Internet technology is growing, particularly in the niche markets CTI serves.

What's noteworthy:
CEO Charles Wu started CTI from his frat house so he and his buddies could play video games. Using pre-WiFi technology modified for outdoor use, he accessed an unobstructed signal from the college a mile away via the rooftop of a nearby 40-story condominium building. He then wired the building for free and charged tenants $50 a month for Internet service.