"operators" - key terms from Wikipedia

air traffic control operators
allow operators
amateur radio operators
annihilation operators
basic operators
boolean operators
commercial operators
compact operators
creation and annihilation operators
dive operators
dnsbl operators
existing operators
fixed line operators
force recon operators
hrt operators
irc operators
ladder operators
linear operators
list of mobile network operators
macross operators
marsoc operators
mathematical operators
military operators
mobile network operators
mobile operators
mobile virtual network operators
modal operators
network operators
normal operators
operators
operators	and variants
operators	include
operators	may
operators	such
operators	within
private operators
quarry operators
query operators
rdbms typically provides operators
resort operators
ride operators
steadicam operators
these operators
tour operators
trio of boutique operators
typically provides operators	to decompose
unbounded operators
various operators
virtual network mobile operators
voip operators