ing control characters in the assignments. The use of 3-circular filters may also increase the level of protection. However, the use of 3-circular filters is not practical on the clipboard.
e-mail
------
* ROT-13 Another invertible filter with similar function as Encode. Compatible with other ROT-13 software.
* 8 to 7 A practical filter for e-mail that has to go through 7-bit channels. All diacritical marks are removed.
Case Conversion
---------------
* É -> e A simple lowercase filter which converts each letter into the corresponding lowercase letter. Diacritical marks are removed.
* i -> I A simple uppercase filter which converts each letter into the corresponding uppercase letter. Diacritical marks are retained.
Mac <==> PC
-----------
These two filters were designed for Turkish text, which may serve as examples for other languages other than English. They are needed by the “Mac <==> PC” script application which calls Easy Convert for character conversion and CRLF (not included) for CR/LF conversion.
The main source of difficulty in Turkish is “I” and “i” being distinct letters. The diacritical marks are also handled in a non-standard way: “c” and “ç” are different letters, but “i” and “î” are the same.
