guided weapons, basic techniques, physics, and engineering. The organization and personnel are described further, in a collection of linked web sites. W. J. Richards, CBE, was Director of TRE at the time of the merger and continued as Director of RRE. William Henry (Bill) Penley, Head of Guided Missiles, took over for a year in 1961. Then George Macfarlane (after postings outside RRE) became Director in 1962. The Physics Division – some of the staff and their work At the time of the name change to Radar Research Establishment in 1953, the senior staff included: Robert Allan Smith (known as R.A. and as Robin). He was Head of the Physics Division, with a staff of about 150. Having worked previously on aspects of radio and radar, his attention had become focused on solid state physics, because of the importance of semiconductors in the development of electronics and infra-red detectors. His early books had dealt with radionavigation, aerials for short wave radio, and thermodynamics. After the name change to RRE, his "most significant book, in historical terms", on the detection of infra-red radiation, was coauthored with F. E. Jones and R. P. Chasmar and published in 1968. The book "for which [he] is best known" is on semiconductors. His other books dealt with wave mechanics of crystalline solids, and, as editor, very high resolution spectroscopy. He left RRE to become Professor of Physics at the University of Sheffield in 1961, came to MIT as Director of the Center for Materials Science and Engineering a year later, and became Vice-Chancellor of Heriot-Watt University in 1968, retiring in 1974. He was an FRS, an FRSE, and received an OBE. George G. Macfarlane. He held a special appointment as Superintendent of the Physics Department, having been assigned to direct the work in theoretical physics. He had been trained as an electrical engineer, and had worked on theoretical aspects of radar prior to the name change of the establishment. One of the designers of the Royal Radar Establishment Automatic Computer. Later, he became Deputy Director of the National Physical Laboratory, then Director of RRE, then Controller of Research at the Ministry of Technology and then Defence. He was knighted for his work. R. P. Chasmar, Head of the infra-red group and co-author of the book mentioned above. Tom Elliott (Charles Thomas Elliott), physicist, at RRE from the late 1960s through transition to DERA. He invented