Staff members of the Section undertook missions connected with indexing of documents and publication of indexes for centres in Guinea and the Niger. 135. In addition, a data base has been built up and an indexing system developed for the analysis and computerization of references to minerals and mining-related literature held by the Ministry of Mines of the Government of Ethiopia. (c) Training and User Services Section 136. Short courses on documentation and data-base management were arranged for trainees as follows: Country/Institution No. of Trainees Duration Benin 2 4 weeks each (August 1984) Botswana 1 4 weeks (August 1984) Kagera Basin Organization 1 4 weeks (July 1984) 137. In addition, documentalists from the Central Co-ordination Office trained national staff in document analysis techniques in the Niger and Guinea. (d) Maintenance, Reprography and Printing Section 138. The Maintenance, Reprography and Printing Section continued to put documents which had been fed into the system on to microfiches. (e) National Documentation Centres 139. During the period under review, the national documentation centre of the Republic of Benin was equipped with a computer configuration. Advisory services were provided to the National Institute for Research of the Government of Botswana to set up a national documentation centre. (f) Subregional Documentation Centres 140. Plans to establish subregional information and documentation centres within the framework of the MULPOCs have been postponed for another two to three years owing to budgetary limitations. Instead, it has been decided to begin implementation with national centres which will gradually evolve into subregional centres. As a result, two centres to serve as national centres for the first two years are being established at Lusaka (Zambia) and Niamey (Niger). - 40 - (g) Directory of African Experts 141. Four supplements to the Directory of African Experts have been published and circulated. Some basic work has been accomplished towards 
**Analysis**
The text appears to be related to the development of documentation and information systems, specifically in the context of African countries. The missions and activities described involve indexing, publication, training, and computerization of documents related to minerals, mining, and government agencies. This suggests a focus on scientific and technical information, which is likely connected to the development of natural resources and the economy.

**Category**
Natural resources and environment, Science and technology