[TeMPOraL]

Real example I heard on internship interview at MS:

Printers lie. Printers have embedded fonts and when you can use them instead rendering the text in software, the results end up better. But printers lie about which fonts they have and which characters are represented in them, so Word has (or used to have) this very big lookup table that basically tells "if you're printing on printer X from vendor Y, don't trust what it says about fonts and just send rendered text to it".