Johnson Flying Service
Johnson Flying Service (JFS) was an American certificated supplemental air carrier (known earlier as an irregular air carrier or nonscheduled carrier), a type of airline defined and regulated after World War II by the Civil Aeronautics Board (CAB), a now defunct federal agency which tightly regulated almost all commercial air transportation in the United States during the period 1938–1978. From 1964, supplemental air carriers were charter airlines; until 1964, they were scheduled/charter hybrids.