LEAD is organised as a searchable electronic tool that uses LaserFiche computer software. LEAD encompasses not only books, articles, papers, monographs, photos, documents, manuscripts, journals, newspapers, pamphlets, posters, postcards, audio and video recordings, films, stamps, jokes, caricatures, paintings, sculpting, cultural material, etc, but also lists of businesses, institutes, associations, clubs, organizations, religious institutions, personalities, migrants and genealogical information.