1978-07-18 /decuslib10-05/01/43,50337/05/simula.exe 1978-08-18 /decuslib10-05/01/43,50337/06/simula.exe 1980-08-20 /decuslib20-03/01/decus/20-0078/sys/simula.exe 1980-12-14 /decuslib20-03/01/decus/20-0078/comp/simula.exe