• operant conditioning
• operas
• operated
• operates
• operatic
• operatically
• operating
• operating accident
• operating and machine data logging
• operating and maintenance instructions
• operating button
• operating capital
• operating characteristic
• operating clock frequency
• operating condition
• operating conditions
• operating consumables
• operating costs
• operating crew
• operating current
• operating cycle
• operating cycles
• operating data
• operating data logging
• operating element
• operating equipment
• operating error
• operating expenses
• operating frequency
• operating funds
• operating hours
• operating income
• operating instructions
• operating lease
• operating life
• operating material
• operating mode
• operating panel
• operating performance
• operating pressure
• operating procedure
• operating process
• operating range
• operating resource
• operating results
• operating room
• operating section manual
• operating sequence
• operating side
• operating speed
• operating state
• operating states
• operating system
• operating systems
• operating table
• operating temperature
• operating temperature range
• operating theatre Br.
• operating time
• operating torque
• operating voltage
• operating-room nurse Am.
• operation
• operation and maintenance
• operation code trap
• operation conditions
• operation display
• operation part
• operation procedure
• operation radius
• operation time
• operational
• operational amplifier
• operational and organisational structure
• operational approval
• operational area
• operational behavior
• operational concept
• operational conditions
• operational control
• operational data
• operational experience
• operational headquarters
• operational limit switch
• operational loss
• operational mode
• operational parameter
• operational qualification
• operational safety
• operational sounding
• operational stability
• operational stability software
• operationally
• operations
• operations centre
• operations code
• operations manager
• operations per hour
• operations plan
• operations planning