Bytes Encoding Form CP1252
EF BB BF UTF-8 
FE FF UTF-16, big-endian þÿ
FF FE UTF-16, little-endian ÿþ
00 00 FE FF UTF-32, big-endian ␀␀þÿ
FF FE 00 00 UTF-32, little-endian ÿþ␀␀

https://en.wikipedia.org/wiki/Byte_order_mark