- 1Mechanical and electrical parts (GEC/2/2/2/212)
1952- 1960, file - 2Associated Electrical Industries Engineering Standards (GEC/3/9/1)
1931-1962, file - 3Associated Electrical Industries Engineering Standards (GEC/3/9/2)
1935-1966, file - 4Associated Electrical Industries Engineering Standards (GEC/3/9/3)
1960-1966, file - 5British Thomson-Houston Co Ltd Engineering Standards (GEC/3/9/4)
1953-1966, file - 6Associated Electrical Industries Engineering Standards (GEC/3/9/5)
1958-1965, file - 7Associated Electrical Industries Engineering Standards (GEC/3/9/6)
1952-1966, file - 8Associated Electrical Industries Engineering Standards (GEC/3/9/7)
1958-1966, file - 9English Electric Company manuals (GEC/3/6/21)
1935-1957, file - 10Associated Electrical Industries order book (GEC/3/1/8)
1920-1955, file - 11British Thomson-Houston Co Ltd negatives (GEC/4/4/6)
c 1907-c 1923, file - 12British Thomson-Houston Co Ltd negatives (GEC/4/4/13)
1905-c 1924, file - 13British Thomson-Houston Co Ltd negatives (GEC/4/4/14)
1927, file - 14British Thomson-Houston Co Ltd negatives (GEC/4/4/15)
c 1920, file - 15British Thomson-Houston Co Ltd negatives (GEC/4/4/16)
1924-1961, file