The problems of subject search on the Internet are no different in principle: search engines may permit easy location of verbally expressed topics, b… - Brian Campbell Vickery

"We do not encourage initiative," said the factory manager. "What you must do is to learn to work to the safety rules." It was my first day in my first job, as a plant chemist in an explosives factory, located in the English countryside, in July 1941. Happily, he was quite wrong. We were not making some old, tried and tested explosive like nitroglycerine or TNT. It was the first large -scale production of a brand-new chemical, code-named RDX-Research Department eXplosive-developed by a government military research department.

The representation of knowledge in symbolic form is a matter that has pre-occupied the world of documentation since its origin. The problem is now relevant in many situations other than documents and indexes. The structure of records and files in databases: data structures in computer programming; the syntactic and semantic structure of natural language; knowledge representation in artificial intelligence; models of human memory: in all these fields it is necessary to decide how knowledge may be represented so that the representations may be manipulated.

John Desmond Bernal (1901-1971) was undoubtedly the most important of the "Western" scientists who, during the twentieth century, accepted the Marxist view of social development. He did more than "accept" it: he tried to sketch the whole history of science from a Marxist viewpoint; he wrote a number of articles explicitly expounding his view of the relation of Marxism to science; and from his student days he played an active role in Communist politics. He has been criticised: during his lifetime, for too readily accepting official Soviet policy, whether relating to society or to science; since his death, for having been too ready to hope that his vision of the use of science for human ends could be implemented by capitalist societies; and at all times, for an allegedly simplistic faith in science as the salvation of mankind.