Iconicity is frequently attested in the earliest writing systems and its presence is often explained in functional terms. For instance, iconic signs lend themselves for rebus writing, may be at the basis for the production of sign inventories (with a similar shape or similar theme), and could also assist in the memorization of signs. It is argued that these three possible functions of sign iconicity are neither necessary nor stable over time. Using examples from both ancient and twentieth century scripts, a more limited and short-term functionality of iconicity is proposed to explain its presence in some as well as its absence in other writing systems of the world.
Caroline Islands script
Thaana script (Maldive Islands)