It appears to be an older Laptop External FDD connector
NEC Versa and IBM Thinkpads seem to have used it (and probably a few others)
I gather some (older) Laptop docking stations may support it...
(eg: the Versa MiniDock 6000 appears to have this port)
http://www.thinkwiki.org/wiki/Floppy_Connector
I presume it is the same... (might be reversed, perhaps this is specifically for NEC Versa...)

