1981-01-05 /BB-H506D-SM_1983/01/cobol/source/ostrng.mac 1981-01-05 /BB-H580C-SB_1981/02/ostrng.mac 1985-09-17 /BB-H506E-SM/01/cobol/source/ostrng.mac 1985-09-25 /BB-H580E-SB_1985/03/ostrng.mac 1985-09-25 /cobol12c/03/ostrng.mac