IN a paper read in London on December 14 before the Institution of Electrical Engineers, J. C. B. Nicol contends that industrial maintenance should be controlled through an organized system. From an analysis of the functions of a maintenance department, he derives the principles underlying good organization and illustrates some of these by examples. There are probably many types of equipment data records in use, and it is believed they are all fundamentally the same if different in detail. These differences must cause considerable trouble to manufacturers when supplying information to various customers, and if standard cards were agreed, manufacturers could easily supply them with their equipment. Manufacturers often supply maintenance instructions and connexion diagrams with their equipment, as well as lists of spare parts. If all such information were provided on standard-size pages, which could be bound into a strong loose-leaf book, it could then be given to workmen with a good chance of survival.