Eufrench is right FYI = for your information FYR = 'for your reference', but also 'for your records'.

Haven't really used FYR before.. but FYI means For Your Information. Maybe FYR is For Your Reference? I could be wrong. :)

We are mostly using 'FYI' and 'FYA' in emails. FYI = for your information FYA = for your attention