Request for obscure text formats

Scientists,

I am looking for examples of obscure text file formats. These files
are often generated by scientific instruments to be read by their
proprietary software. Or they might come from a program not intended
to be machine readable. These examples are for some motivation slides
for my SciPy conference talk [1] on Parsita.

If you have an example, please send it my way. If you don't want to
send a whole file, enough text to fill a slide is sufficient.

Thanks so much!

David Hagen


[1] https://www.scipy2021.scipy.org/schedule