- 1Drawing Office records (GEC/2)
1874-1994, sub-fonds - 2Engineering records (GEC/3)
1846-1993, sub-fonds - 3Reports (GEC/1/1)
1920-1993, series - 4Drawing registers (GEC/2/1)
1905-1983, series - 5Files (GEC/1/3)
1953-1993, series - 6Drawings (GEC/2/2)
1874-1993, series - 7Order books (GEC/3/1)
1846-1974, series - 8Manuals (GEC/3/6)
1913-1984, series - 9Publications (GEC/4/1)
1904-1996, series - 10Photograph albums (GEC/4/3)
c 1900-1975, series - 11Microfiche (GEC/4/4)
1857-c 1993, series - 12Spare parts catalogues (GEC/4/7)
1898-1975, series - 13Quality standards (GEC/1/4)
1920-1992, series - 14Associated Electrical Industries (AEI) drawings (GEC/2/2/34)
1955-1990, sub-series - 15Equipment and wiring diagrams including for Nyasaland & Trans-Zambesia Railways (GEC/2/2/34/1)
1962-1963, file