This first supplement to my An Annotated Bibliography on Ibn Sina (1979-1989), published in 1991, informs the reader about all new studies on Ibn Sina (Avicenna) published in the period 1990-1994, and also offers corrigenda and addenda to the former bibliography. Also in the supplement, attention is paid to Western, and to non-Western publications. Moreover, it has been tried to be even more exhaustive by including publications, which have not Ibn Sina (Avincenna) in the title, but which nevertheless are offering important and innovative information about his life or thought. First, an overview is given of the new editions and/or translations of Ibn Sina's works, which are once more identified according to the classic bibliographies of G.C. Anawati and M.Mehdavi. Hereafter, separate chapters are dedicated to studies of a biographical and a bibliographical nature. No less than ten chapters are devoted to materials dealing with Ibn Sina's philosophical thought (e.g., logic, psychology, metaphysics, religious thought, sources, influences both in the East and the West). Finally, materials dealing with in two separate chapters. It has to be noted that almost all publications are annotated with a summary of their most original points and a short critical evaluation. An index, which includes the names of all authors, ancient, medieval and contemporary, has been added. In sum, this work aims at providing a clear, concise and comprehensive work- instrument for all future Avicenna research. It is not only of great interest for all scholars working in Arabic-Islamic philosophy, science and medicine, but also for historians of philosophy and mediaevalists. "Hay que felicitar al autor de este minucioso trabajo que, como su anterior bibliografia, es de un valor incalculable para todos aquellos que nos consagramos al estudio del pensamiento del gran filosofo islamico, al ser instrumento necesario con el que contar para futuras investigaciones sobre Avicena" (R. Ramon Guerrero in: Revista Espanola de Filosofia Medieva, Numero 7, 2000, p. 261)