The term 'ATLAS BOX' can be broken down into two words, 'ATLAS' and 'BOX'. ATLAS is a figure from Greek mythology who was tasked with holding up the sky. A BOX is a container used to store items. Together, the term 'ATLAS BOX' could refer to a container that is strong enough to hold up the sky, or it could refer to a container that is used to store items related to the mythological figure of ATLAS. INSET, which is a five-letter word, could refer to the act of placing something inside a BOX, such as items related to ATLAS.