There are a number of methods to input Esperanto letters and text on a computer, e.g. when using a word processor or email. Input methods depend on a computer's operating system. Specifically the characters ĵ, ĝ, ĉ, ĥ, ŭ, ŝ can be problematic. All modern email clients and servers accept Unicode text as UTF-8 in at least one of the following Content-Transfer-Encoding types: 8bit, quoted-printable, or base64. Esperanto text will normally be transmitted in UTF-8 with a Content-Transfer-Encoding of either 8bit (if the server supports it) or (failing that) quoted-printable.
