From Abacus to Calculator

This is part of a series which explores the development of systems of recording and measuring, from the first forms of writing and the earliest calendars, to the latest in calculators and quartz clocks.

The Signs of the Times series presents the history of basic systems of communication and calculation for children aged eight to ten. Organised chronologically from ancient history to the present, the volumes in the series are illustrated throughout with colourful photographs and drawings of artefacts and objects.