Originated as AS 1807.0-1989, AS 1807.1-1976, AS 1807.2-1976, AS 1807.5-1976, AS 1807.6-1976, AS 1807.15-1976, AS 1807.18-1976, AS 1807-1989, AS 1807.21-1989, AS 1807.22-1989, AS 1807.23-1989, AS 1807.25-1990 and AS 1807.26-2004. Previous editions AS 1807.0-2000, AS 1807.1-2000, AS 1807.2-2000, AS 1807.5-2000, AS 1807.6-2000, AS 1807.15-2000, AS 1807.18-2000, AS 1807-2000, AS 1807.21-2000, AS 1807.22-2000, AS 1807.23-2000, AS 1807.25-2004 and AS 1807.26-2004. Revised, amalgamated and redesignated as AS 1807:2021.