Started 1966 with BPS Assembly, past to BOS 8K and Basic Assembler for /360, then to Fortram, Cobol, RPG 1 for 360/20 and 40 other languages and many variants. Incursions into the Kernel of 360/370 DOS for time accounting and spooling. Physical OICS to read entire Disk cylinders with losing a spin. Then I managed a couple of computer centers. In 1978 I designed a Object oriented Information system for Argentina banks. Its still current as its modular architecture has allowed expansion and covering all new needs dreamed up by the continual changes of policies of the central bank, including the hyperinflation. It runs on /390 and 16bit Windows.