to provide some compression
* Perform the 8-to-6 bit conversion.

The resulting files were roughly the same size as those from BinHex 2, but much more robust, with the metadata information in the header being protected from corruption by no longer being in plain text. The file extension for this new format was .

At about the same time, most online services had started to support robust 8-bit file transfer protocols such as ZMODEM. This obviated the need for

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