Inca Empire: An empire in South America from the 12th century AD until its conquest by the Spanish in 1533. It was known for its sophisticated organization and infrastructure.
Andean Civilizations: Various indigenous cultures that developed in the Andean region of South America from the early pre-Columbian period to the arrival of Europeans, including but not limited to the Inca civilization.
Pictogram: A symbol representing a concept, object, activity, place or event by illustration. Similar to quipu, it is another form of non-verbal communication used historically.