newsgroups, etc.

It has now been largely replaced by MIME and yEnc. With MIME, files that might have been uuencoded are instead transferred with Base64 encoding.

Encoded format

A uuencoded file starts with a header line of the form: begin is the file's Unix file permissions as three octal digits (e.g. 644, 744). This is typically only significant to Unix-like operating systems.

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