Original: BBC Radio Scotland was founded as a full-time radio network in 1978, although the name had been used since 1974 for the Scottish opt-out version of BBC Radio 4 (previously the Scottish Home Service and then Radio 4 Scotland).
Simplified: BBC Radio Scotland was founded as a full-time radio network in 1978, although the name had been used since 1974 for the Scottish opt-out parts of BBC Radio 4.