by Mahou (873114) writes: if it is a noun then do not use it as a qualifying adjective (what kind of display? an lcd display!) just use it as a noun, LCD. it is what it is. and it is a kind of display. so you are completely wrong.PIN is the word for the number, no need to remind people that it is a number. there is no such thing as a PIN hieroglyph, PIN doodle, or PIN secret handshakeATM is the word f