"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