Following is part III of the listing of papers presented: Correlation Techniques Applied to the Dynamic Testing of Aircraft Autoland Systems. By J. D. Lamb, A. R. Pankhurst and D. R. Towill. New Digital Recording Methods for Flight Data Acquisition. By J. W. King. Recent Advances in Magnetic Recording Heads. By J. U. Lemke. Philosophy and Implementation of a Serial PCM System. By J. M. Aucken and H. N. Welby. Modular Design of Digital Data Acquisition Systems for Flight Test Purposes. By M. Catton.