The purpose of the project was to provide machine-readable economic and social history statistics relating to the whole of Ireland for the period 1821-1971. Further information about the project is available on the QUB Centre for Data Digitisation and Analysis website. The main tables are: Occupations grouped by counties, age groups and gender (1831-1911) Occupations grouped by counties, religion and gender (1871-1911) Occupations grouped by counties, literacy and gender (1871-1911) All the relevant background material is incorporated either in the documentation files or in the scanned images of the tables of contents, prefaces, and notes in the original source.