Punch cards are easy to read even without card readers, just when the thing and use OCR (optical card reader) software. You're probably best of using an obsolet

Punch cards are easy to read even without card readers, just when the thing and use OCR (optical card reader) software. You're probably best of using an obsolete helical scan tape format since those tapes are hard to read even between devices, let alone when no drive can be found.