There is no listed patron but St Isidore of Seville is mentioned and regarded by many as the unofficial patron saint of computer science including the internet.
It is possible that he may well be officially designated as such by the Church authorities. In a sense he is an extraordinary choice considering that he lived in the sixth century, 14 centuries before computers were invented and came into daily usage.
He was born in Seville in Spain and was educated by his brother, a monk, and became one of the most learned men of his time. Possessed of an encyclopedic knowledge which he communicated in his books, he became most influential in clerical and monastic education. His most famous book is called ‘Etymologies’, which is a kind of encyclopedia containing elements of grammar, theology, history, mathematics and medicine.
He shares the unofficial title of ‘Schoolmaster of the Middle Ages’. He succeeded his brother as Archbishop of Seville and presided over Church councils and was noted for his austere life as well as his charity to the poor. He was canonised in 1598; his feast day is on April 4th.
(St Martin Magazine 4/11)