This is a system, which effectively, is an alternative to writing itself. The ideographic and mnemonic symbols convey different pieces of information without using the linguistic aspects that we use today. Proto-writing is the prime example of my choice of the Madrid Codex, using images and symbols to put across meanings and stories.
Examples of Proto-writing:
Neolithic China – Jiahu symbols
Neolithic Europe – Vinča signs
Indian Bronze Age – Indus script
African Iron Age – Nsibidi