This article is one in a series of 10 stories we're running this week covering today's most significant emerging technologies. It's part of our annual "10 Emerging Technologies" report, which appears in the March/April print issue of Technology Review.

Finding your way around a new city can be exasperating: juggling maps and guidebooks, trying to figure out where you are on roads with no street signs, talking with locals who give directions by referring to unfamiliar landmarks. If you're driving, a car with a GPS navigation system can make things easier, but it still won't help you decide, say, which restaurant suits both your palate and your budget. Engineers at the Nokia Research Center in Helsinki, Finland­, hope that a project called Mobile Augmented Reality Applications will help you get where you're going--and decide what to do once you're there.