A concordance is an alphabetical list of the principal words used in a book or body of work showing location in the text with immediate contexts. Because of the time and difficulty and expense involved in creating a concordance in the pre-computer era, only works of special importance, such as the Bible, Qur'an or the works of Shakespeare, had concordances prepared for them. Refer: Barman, B. (2022). A comprehensive book on Library and Information Science. LIS Links. Page 207