The latest edition of "Ideals and Realities" includes some of the most recent talks given by Professor Abdus Salam. They replace a few essays which were published in the second edition. An attempt has also been made to update some of the figures rendered absolete with the passage of time.

Originally published in 1972, the twelve articles in this volume discuss various aspects of quantum mechanics that owe their origin to the work of P. A. M. Dirac. Each of the distinguished contributors reviews Dirac's work and discusses its development in some detail. Since Dirac's work ranged widely, the resulting volume constitutes a valuable survey of the state of quantum mechanics. A small part of the book contains personal reminiscences of Dirac in Cambridge and of his early visits to the USA and gives a historical account of the development of quantum mechanics during the decade 1924...

This is a selection from over 250 papers published by Abdus Salam. Professor Salam has been Professor of Theoretical Physics at Imperial College, London and Director of the International Centre for Theoretical Physics in Trieste, for which he was largely responsible for creating. He is one of the most distinguished theoretical physicists of his generation and won the Nobel Prize for Physics in 1979 for his work on the unification of electromagnetic and weak interactions. He is well known for his deep interest in the development of scientific research in the third world (to which ICTP is...