Even with the use of computers, producing a concordance (whether on paper or in a computer) may require much manual work, because they often include additional material, including commentary on, or definitions of, the indexed words, and topical cross-indexing that is not yet possible with computer-generated and computerized concordances.
A famous use of a concordance involved the reconstruction of the text of some of the Dead Sea Scrolls from a concordance.
This restriction was circumvented by Martin Abegg in 1991, who used a computer to "invert" a concordance of the missing documents made in the 1950s which had come into the hands of scholars outside of the International Team, to obtain an approximate reconstruction of the original text of 17 of the documents.