Abstract

The medieval computus was intended primarily for literate and numerate ecclesiastical users; reading the Latin computus required a good knowledge of technical Latin, while understanding its calculations presupposed some formal education in arithmetic and astronomy. By the mid-thirteenth century, users would have included a small group of literate and numerate laymen; by the mid-fifteenth century, users would have included the less educated and even semiliterate, as a consequence of a more extensive range of computus material made available for the purpose in the vernacular