This volume comprises of papers from the Abdus Salam Memorial meeting held from 19th - 22nd November 1997 on the anniversary of the death of Professor Abdus Salam, Nobel laureate and Founder-Director of the International Centre for Theoretical Physics. The papers reflect the long-lasting passion of the professor for the theory of fundamental forces. Most of the contributions are concerned with recent developments in the theory of superstrings, including duality, D-branes and related topics.
