While the Abacus may seem useless at first, this small piece of equipment will become very handy for a group of adventurers when traveling to a city to buy and sell things. All the money of the group can be added up in no time, thus giving a quick overview of their finances. It is therefore a very useful item, and every group should have one to prevent either spending too much or not realizing they possess insufficient funds for a purchase.
- Iolo has one in Ultima VII, and explains how it works.
- One is found in the palace of Fawn in Ultima VII Part Two. Additionally, they can be purchased from Bucia in Moonshade
- Another Abacus is found in the house of Mythran in Ultima VIII.
- In Serpent Isle, the Abacus differentiates between Monetari, Filari, Guilders, gold coins, gold bars, gold nuggets, gems, and jewelry.