What are the common connectors used in stackable daughter cards?

[Number2Pencil]

In stackable daughter cards, what type of connectors are typically used? They're kind of like IC pin sockets but closer together with several rows. They're probably more rigid as well. I never knew what they were called so if you know I'd appreciate it!

 

[berkeman]

AMP (now Tyco) makes a number of connectors, including some stacked connections:

General AMP/Tyco website: http://www.tycoelectronics.com/components/

Connector Picture Search: http://www.tycoelectronics.com/picturesearch/

Closeup Picture Search showing (4) Board-to-Board Stacked: http://www.tycoelectronics.com/picturesearch/pictureSearch_PCBconnectors.asp

 

[Number2Pencil]

Thank you sir!