The project called "Informatización y etiquetado del "Diccionario crítico etimológico castellano (DCECH) de J. Corominas" (Gredos, Madrid, 1980-1991) corresponds to the second stage of the dictionary computerization, which started thanks to the DGICYT PB92-0599, and consist of two main aspects: a) Finish off the computerization of the DCECH; b) Correct the data bases which have resulted from the computerization. The first stage, which has been concluded by means of the previous project, was devoted to the development of an accurate research on the internal structure of each article in order to set up the standard structure which enables to compile the recurrent data of each entry in the appropriate order, using relational date bases as basic tools. Having concluded this stage, it is possible to begin a new implementation stage of the data bases so as to correct the information that they