My first job out of college in the early 80's was working on diagnostics for an old NASA computer. "What language do I use?" I asked my boss. "We don't have a compiler". OK, I thought, assembly language. "No" said my boss "We don't have an assembler". "OK" I guess I'll write machine language. "What's the development environment?" "We don't have one. There's no editor. There's no network. There's no keyboard or monitor" I had to write my diagnostics in 96 bit hex using pencil and paper and then enter my program into the computer using toggle switches on the front panel. Kids today have no idea :-) And get off my lawn!