I have kept copies of code and email from every job since the 1980s. Some of it is now hopelessly unusable since codepoints have drifted (I mean, the raw data

I have kept copies of code and email from every job since the 1980s. Some of it is now hopelessly unusable since codepoints have drifted (I mean, the raw data is still there but the characters are garbage in ASCII, are probably badly transcoded EBCDIC).