(FORTUNE Small Business) – Tech vendors view the small-business market as one vast opportunity. But there are 23.7 million small firms in the U.S. alone, according to the SBA. Getting a handle on all those customers is no easy task. We culled data from many sources to create this small-business snapshot, including an exclusive FSB-Zogby Interactive survey of more than 2,000 entrepreneurs nationwide. The results may surprise you. --R.M.M.