Back when they were BIG, an appropriate powder could be dusted onto magnetic media to reveal the magnetized and unmagnetized regions, and assuming someone had months to kill on a stupid endeavor, software could be detected and decoded from a seemingly ethereal form of storage.
In the 'spook' world of spies, an audio recording of a dot matrix printer (Wiki that if you are too young to know what that is) printing a document could be utilized to regenerate the document.
Even IR laser bouncing off a window in a room with such a printer could be utilized to do that.
In the 'spook' world of spies, an audio recording of a dot matrix printer (Wiki that if you are too young to know what that is) printing a document could be utilized to regenerate the document.
Even IR laser bouncing off a window in a room with such a printer could be utilized to do that.
