I was wondering what the oldest computer file,
typed in myself on my disk is.
Of course that had to be a KIM-1 related file. Around 1977 I started to write code for the KIM-1 and loaded/saved on audio cassettes. In 2004 I dumped all my KIM-1 audio files to wave files, and converted those to binaries and extracted assembler sources. The origin of Tiny Basic, Microsoft Basic KB9, Microchess, MICRO ADE, Focal we nowadays can use on the PAL-1.
So i looked at my audio cassette files and it has to be a small Basic program, an attempt to do a readme file. Clearly 1978, MS BASIC. Of course no time stamp, and the file name is 01.
The oldest file, but printed on paper, typed in by me on a computerare the Pascal programs I wrote around 1977, on a Unix System 6 PDP-11/45 at university.