Roman abacus Directory References Discover 10 Best Hockey Players of All Time Timeline of the September 11 Attacks What’s the Difference Between a Turtle and a Tortoise? 6 Animal Species that Mate for Life New Seven Wonders of the World The First Indy 500: A Spectacular Start in 1911 8 of the World’s Most-Remote Islands Contents Ask the Chatbot a Question Roman abacus calculating device Ask the Chatbot a Question Learn about this topic in these articles:description In abacusIn the Roman abacus the board was given grooves to facilitate moving the counters in the proper files. Another form, common today, has the counters strung on wires.Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.