The Data Base Task Group ( DBTG ) was a working group founded in 1965 by the Cobol Committee , formerly Programming Language Committee , of the Conference of Data Systems Language ( CODASYL ) . The Data Base Task Group ( DBTG ) was a working group founded in 1965 ( initially named the List Processing Task Force and later renamed to DBTG in 1967 ) by the Cobol Committee , formerly Programming Language Committee , of the Conference of Data Systems Language ( CODASYL ) .