100 Fastest-Growing Tech Companies 

Our rankings show another banner year for the leaders of the tech revival.

Quality Systems
Rank: 78 (Previous rank: 25)
Get quote: QSII
Employees: 538
Headquarters: Irvine, CA
Sector(s): Medical
Why it's hot:
Its software for doctors automates everything from medical records to insurance claims. A deal with Siemens opened the door to the hospital market.
Revenue 147.6 29.7 46
Earnings 32.4 48.1 60
Operating cash flow 28.7 32.2 79
Stock return (2006) -3
Headcount change (2006) 28.7
From the June 2007 issue
Latest Headlines for QSII
B2 100 Headquarters
B2 100 Companies 2007
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How we rank them
To find the B2 100, we screened more than 2,000 tech companies that have been publicly traded on a U.S. stock exchange for at least three years, have a market capitalization of at least $50 million, and have had positive operating cash flow over the past 12 months. Zacks Investment Research of Chicago ranked the resulting list using four financial criteria: growth in revenue, profit, and operating cash flow during the past three years, and the 12-month stock return as of Dec. 31, 2006. Cash flow growth counts for 40 percent of a company's ranking. Each of the other criteria counts for 20 percent. Additional research was provided by Factset. If you have further questions about Business 2.0's 100 Fastest growing technology companies, please e-mail