In "A parent's primer to computer slang," published two weeks ago by Microsoft, Orthodox Jewish parents can finally answer the question, "We thought AOL would help him. Where did we go wrong?":
Non-alphanumeric characters may be combined to form letters. For example, using slashes to create "/\/\" can substitute for the letter M, and two pipes combined with a hyphen to form "|-|" is often used in place of the letter H. Thus, the word "ham" could be written as "|-|4/\/\."