(concept sketch)
How do I love thee is a pair of abacus that are synchronized over the internet. Changes in one abacus are transmitted to the remote abacus and displayed.
Source: Kaye, J. ‘Jofish’ and Goulding, L. 2004. Intimate objects. In Proceedings of the Conference on Designing Interactive Systems Processes, Practices, Methods, and Techniques (DIS’04). ACM Press, 341–344.