rfc-1642
UTF-7 - A Mail-Safe Transformation Format of Unicode
This document describes a new transformation format of Unicode that contains only 7-bit ASCII characters and is intended to be readable by humans in the limiting case that the document consists of characters from the US-ASCII repertoire. This memo defines an Experimental Protocol for the Internet community.
obsoleted by
- rfc-2152 — UTF-7 A Mail-Safe Transformation Format of Unicode