The term 'Shout of Discovery' is used to describe the exclamations made when a person finds something they have been looking for. The most common shouts of discovery are 'Eureka' (6 letters), 'AHA' (3 letters) and 'Oho' (3 letters). Eureka is a Greek word meaning 'I have found it' and is attributed to the ancient Greek mathematician Archimedes. AHA is an expression of surprise or realization, while Oho is an expression of surprise or joy. All three of these shouts of discovery are used to express joy and excitement when a person finds something they have been searching for.