1977-12-14 /KS10_APT_INSTALL_TAPE/08/subsys/conv20.exe 1977-12-14 /red405a2/11/subsys/conv20.exe 1978-05-23 /bb-d868a-bm/01/subsys/conv20.exe 1978-08-29 /AP-4171F-BM/06/new-subsys/conv20.exe 1978-08-29 /AP-4172F-BM/01/new-subsys/conv20.exe 1978-08-29 /BB-H137A-BM/06/new-subsys/conv20.exe 1978-08-29 /BB-H138A-BM/01/new-subsys/conv20.exe 1978-08-29 /bb-d868b-bm_tops20_v3a_2020_dist/01/new-subsys/conv20.exe