Committee on Transfer of Technology, sixth session Committee on Tungsten, eighteenth session Committee on Shipping, twelfth session 10-21 March 21-30 May 26-30 May 15-28 September 29 September- 10 October 13-24 October 27 October- 7 November 3-7 November 10-21 November Committee on Invisibles and Financing related to Trade, twelfth session, first part (Financing related to Trade) Committee on Commodities, twelfth session Permanent Sub-Committee on Commodities, fifth session Permanent Group on Synthetics and Substitutes (if required) Working Party on the Medium-term Plan and the Programme Budget, twelfth session Joint Advisory Group on the International Trade Centre UNCTAD/GATT, nineteenth session * * * Duration 2 weeks 2 weeks 1-2 weeks 1 week 1 week 9 days Commodity conferences and other commodity meetings Working parties, study groups and expert groups As required (up to 40 weeks) As required (up to 16 weeks) -18-C. Tentative schedule of meetings for 1987 Working Party on the Medium-term Plan and the Programme Budget, thirteenth session Trade and Development Board, thirty-fourth session Trade and Development Board, fifteenth special session 1/ United Nations Conference on Trade and Development - Pre-Conference meeting of senior officials Seventh session Special Committee on Preferences, fifteenth session Working Party on the Medium-term Plan and the Programme Budget, fourteenth session Trade and Development Board, thirty-fifth session Working Group on International Shipping Legislation, thirteenth session Intergovernmental Group of Experts on Restrictive Business Practices, sixth session Committee on Invisibles and Financing Related to Trade, twelfth session, second part (Insurance) Sessions of two or three Main Committees Permanent Sub-Committee on Commodities (if required) Committee on Tungsten (if required) Permanent Group on Synthetics and Substitutes (if required) Joint Advisory Group on the International Trade Centre UNCTAD/GATT, twentieth session * * * 1 week 2 weeks 1 week 2 days 4 weeks 1-2 weeks 1 week 2 weeks 2 weeks 
**Analysis**
The text appears to be a schedule of meetings related to international trade and commerce, with mentions of commodities, shipping, and trade agreements. The presence of committees and working groups focused on specific areas such as tungsten, synthetics, and invisibles also suggests a strong connection to international trade. The text does not mention any specific topics related to human health, education, employment, or humanitarian aid, which are typically found in other categories.

**Category**
International trade, Transport and communication