BinHex, short for "binary-to-hexaecimal", is a binary-to-text encoding system that was used on the Mac OS for sending binary files through e-mail. It is similar to Uuencode, but combined both "forks" of the Mac file system together, along with extended file information. BinHexed files take up more space than the original files, but are far less likely to be corrupted in transit.