 The JIO also maintained the National Assessments Staff (NAS) which supported the National Intelligence Committee (the predecessor to the National Intelligence Coordination Committee) until 1977 when it was assumed by the Office of National Assessments.The NAS was responsible for preparing long–range analytical assessments of international issues.The foreign intelligence assessment functions of JIO were assumed by the Office of National Assessments (ONA) in 1977 and the JIO was fully replaced by the Defence Intelligence Organisation (DIO) in 1990.