"dual" - key terms from Wikipedia

dual
dual	address cycle
dual	agency
dual	alliance
dual	analog
dual	analog controller
dual	and third country nationals
dual	attention
dual	band
dual	carriageway
dual	channel
dual	citizenship
dual	clutch transmission
dual	combat sighting system
dual	core
dual	degree
dual	disk drive
dual	exhaust
dual	exhausts
dual	federalism
dual	form
dual	fuel
dual	gauge
dual	language
dual	layer
dual	link
dual	link interface
dual	meet
dual	mode
dual	monarchy
dual	mono
dual	national
dual	nationality
dual	number
dual	numbers
dual	polyhedron
dual	purpose
dual	rectifier
dual	role
dual	shock
dual	sim
dual	space
dual	stack
dual	stripes and red accent
dual	suspension
dual	usb
items by dual	and third
points in a dual	meet
rotary valve single dual	purpose
usml items by dual