Correspondence, programme, conference papers and notes concerning a CEC seminar on the impact of engineering on the socio-economic system, held in Harare, Zimbabwe, October 1983. Coales gave a paper at the conference. Includes copies and abstracts of the following papers: W J Ascough, 'Appropriate technology for growth and development; 'Professor A Bhattacharyya, 'Status of production engineering in developing countries'; J F Coales, 'Engineering leadership: the next essential'; E D D Cochrane and C A Martin, 'The engineers contribution to the development of Zimbabwe industry'; J A Codd, 'Tranport technology or socio-economic development'; A O Faluyi,'The engineer and the control of infection in hospitals'; J R Hennessy, 'Irrigation'; Professor Kopalarpillai Mahadeva, 'Appropriate technologies for third world development'; R P Marks, 'Sewage disposal or water reclamation?'; Donald L Mordell, 'A priority for African development'; Colin L Pritchard, 'Chemical engineering in Tanzania'; L S de Silva, 'Technical paper on housing'; K A Viewing, 'Mining and the development of Zimbabwe'. Also includes minutes of meetings of the CEC Council, the Commonwealth Board on Education and Training and the CEC African Region, all held in Harare at the time of the conference.