"operating" - key terms from Wikipedia

aix operating	system
began operating
bell operating	companies
bell operating	company
bus operating
chief operating	officer
companies operating	former
companies operating	former chicago
disk operating	system
distributed operating	system
fighter jets operating
forward operating	base
forward operating	base chapman
guest operating	systems
joint operating	agreement
maximum operating	depth
maximum operating	speed
mobile operating	system
net operating	income
network operating	system
operating
operating	activities
operating	agreement
operating	companies
operating	company
operating	costs
operating	environment
operating	expenses
operating	frequency
operating	income
operating	lease
operating	margin
operating	point
operating	pressure
operating	profit
operating	rod
operating	room
operating	rooms
operating	rules
operating	speed
operating	system
operating	systems
operating	temperature
operating	thetan
other operating	systems
standard operating	procedure
train operating
train operating	companies
train operating	company
unix operating	system