From Rosie Forth
Ian Walker writes that the ternary system used to write text messages on mobile phones is inefficient because, unlike Morse code, it is not “letter frequency optimised” (29 March, p 30). Before we think of changing the text input method, we might have to recalculate those frequencies. The most common letter in the English language is known to be “e”, but I doubt if that’s true of txt msgs.
Colchester, Essex, UK
