Moon is a system of reading and writing which uses tactile symbols based on lines and curves to represent letters, numbers and punctuation marks.
It is easier to learn than braille, as the letters are easier to distinguish by touch. However, Moon cannot be written by hand, is even bulkier than braille and currently there is very little literature available in Moon.
Moon is used by a very small number of people, most of whom are elderly.
As it is unlikely that you will receive requests for Moon you do not need to produce materials in Moon as a matter of course. If you receive a request for Moon, ask whether another format, such as audiotape, would be a usable alternative. If Moon is required, contact the RNIB for guidance.