TheIndex Thomisticus was adigital humanities project begun in the 1940s that created aconcordance to 179 texts centering aroundThomas Aquinas. Led byRoberto Busa, the project indexed 10,631,980 words over the course of 34 years, initially ontopunched cards. It is considered a pioneering project in the field of digital humanities.
Busa began the project in 1946.[1] In 1949,IBM agreed to sponsor the project until its completion.[2] They assigned Paul Tasman, an executive at the company, to work with Busa.[3] Busa selected 179 texts centering aroundThomas Aquinas that would be put into a form that wasmachine-readable. 118 of the works were written by Aquinas, and the remaining 61 items were either at one point mis-attributed to him or an attempt to complete an unfinished work begun by Aquinas.[2]
A significant part of the project was thedata entry, which was meticulously carried out by a team of female keypunch operators. Their dedication and precision were instrumental in the success of the project.[4] This work ofpunching the text was made between 1950 and 1966. They worked inGallarate, Italy,[5][6] and the project peaked in size in 1962 with 70 workers.[7] After the punching was complete, the data waslemmatised in a semi-automatic process.[5]
The completed project indexed a total of 10,631,980 words in fifty-six volumes over 70,000 pages—divided into ten volumes of indexes, followed by thirty-one volumes ofconcordances of Aquinas's works, eight volumes of concordances of related authors, and seven volumes that reprinted the source texts.[2][8] The seven completely reprinting the source texts were sold separately.[2] The first volume was published in 1974,[9] and publication was completed in 1980. The project used a total of 1,500 kilometres (930 mi) of tape[10] and it took an estimated 10,000 hours of computer work and 1 million hours of human work to complete.[3] TheIndex was released onCD-ROM in 1992 and a website was launched in 2005.[10]
A review published of the project inComputers and the Humanities described it as "as innovative and fascinating a reference work as the technology that made it possible."[11] In 1993, the project was described as the "second largest printed work of this century". The same review called it "excessive" and asked what its purpose was, going on to describe it as "the mostpedantic work ever written".[8] In 2020,The Economist described it as "the creation story of the digital humanities."[10] An article inUmanistica Digitale wrote that "the project developed for the first time, methods for dealing with unstructured language".[12] It influenced projects such asKey Word in Context.[12] The project is also sometimes listed as one of the earliest instances of an e-book.[13]