1985-07-11 /BB-M836C-BM/01/tools/typvfu/typvfu.exe 1988-03-11 /k20v7c/01/tools/typvfu.exe 1988-05-27 /bb-m836d-bm/01/tools/typvfu/typvfu.exe 1988-05-27 /tops20_version7_0_tools_tape_clock_tape/01/tools/typvfu/typvfu.exe