"operating" - key terms from Wikipedia

army operating
bell operating	companies
bell operating	company
bsd operating	systems
chief operating	officer
companies operating	former
companies operating	former chicago
disk operating	system
embedded operating	system
guest operating
guest operating	system
guest operating	systems
host operating	system
macintosh operating	system
maximum operating	speed
modern operating	systems
net operating	income
network operating	system
now operating
operating
operating	activities
operating	agreement
operating	between
operating	cash flow
operating	companies
operating	costs
operating	environments
operating	expenses
operating	income
operating	lease
operating	leverage
operating	margin
operating	procedure
operating	rod
operating	room
operating	system
operating	system kernels
operating	systems
operating	temperature
operating	thetan
other operating	systems
regional operating	companies
secure operating	systems
server operating
standard operating
standard operating	procedure
train operating	companies
train operating	company
unix operating	system
web operating	system