When investors think of spy technology, they probably conjure images of James Bonds’ laser-shooting wristwatch or X-ray eyeglasses. Well, Applied Signal Technology, of course, makes none of that. But the company’s business is no less exciting – or potentially profitable.

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Applied Signal Tech operates in the signals and communications-intelligence business. The company’s products work to detect enemy communications and electronics in the field and detect and infiltrate enemy communications over telco networks. If a bad guy is on his phone, or he was dumb enough to leave it on after his last call, APSG will find him. This market worldwide reaches $3.5 billion to $5 billion a year.