This CD-ROM edition of the Léxico hispanoamericano brings together the five volumes of Peter Boyd-Bowmans̕ extensive lexicon of the Spanish language used in the Americas, initially published as a microfiche series by the Hispanic Seminary of Medieval Studies between 1982 and 1994. Demand for the Léxico, widely praised as a unique reference work in the field of Hispanic linguistics, quickly led to the unavailability of the microfiche edition. The CD-ROM version therefore gives scholars a new opportunity to acquire the Léxico, in a format which offers not only a complete revision of the work together with the incorporation of new citations, but also the advantages of custom-designed software, making use and manipulation of the data fast, efficient, and reliable.It contains over 80,000 headwords drawn from 387 sources, spanning the years 1493-1993. Each headword in the Léxico is followed by a number of citations illustrating its grammatical properties, semantic content, co-occurrence with other linguistic forms, and other aspects of its use. The citations are accompanied by their documented date and location, and information on the sources from which they are taken. Those sources include all types of material, from literary texts to private correspondence, and from legal documents to freight lists.