@653,391
You could also store arbitrary raw data on thin sheets of paper by printing them out (digital-to-physical), you would need a good scanner though. I don't think paper is exactly a good medium for it, read-only memory is a thing (not sure how to express this), there are new blue CDs that can store petabytes (hyper CD-ROMs). I absolutely fucking hate how things just pass by and become completely forgotten by people as if they never happened.