Images: Mystery tech HQs identified

The company in this clutch of towers is Amazon.com, based at 1200 12TH Ave S, Suite 1200, Seattle, WA 98144.

The business with this nice, regular layout is Intel, headquartered at 2200 Mission College Blvd., Santa Clara, CA 95052.

Organic outline, fan-shape building layout--it's got to be Oracle, based at 500 Oracle Pkwy, Redwood City, CA 94065.

Sun Microsystems has this campus ringed by traffic circles, at 4150 Network Circle, Santa Clara, CA 95054.

Lots of parking for the employees of Cisco Systems, at 170 West Tasman Dr., San Jose, CA 95134-1706.

Yahoo's campus has well-watered greens crisscrossed by paths. It's at 701 First Ave., Sunnyvale, CA 94089.

Here, covered walkways let Google's workers go from building to building at 1600 Amphitheatre Parkway, Mountain View, CA 94043.

Lots and lots and lots of parking for workers at Dell's plant and offices, at One Dell Way, Round Rock, TX 78682.

Apple Computer's layout includes huge curved windows and circular lawns. It's at 1 Infinite Loop, Cupertino, CA 95014.