13-Letter Words Containing: _,A,K,N,O,R

• the process whereby hydrocarbon molecules of petroleum are broken down into kerosene and gasolene by the addition of hydrogen under high pressure in the presence of a catalyst

• the execution of low priority programs while higher priority programs are not using the processing system

• a telephone with a microphone and loudspeaker; can be used without picking up a handset; several people can participate in a call at the same time