DATA COLLECTION AND ANALYSIS: J.R. Helliwell: The recording and analysis of data from macromolecular crystals; I.A. Andersson, I.J. Clifton, V.Fülöp, & J. Hadju: High speed, high resolution data collection on spinach Rubisco using a Weissenberg camera at the Photon factory; J. Hajdu, S.C. Almo, G.K. Farber, J.K. Prater, G.A. Petsko, S. Wakatsuki, I.J. Clifton, & V. FülÖp: On the limitations of the Laue method when applied to crystals of macromolecules; A.G.W. Leslie: Molecular data processing; B. Schierbeek: New developments on the Enraf-Nonius FAST detector; D. Schwarzenbach: Statistical descriptors; S.R. Hall: CIF standard data; PROGRAM PACKAGES: D.J. Watkin: Crystals; K.D. Watenpaugh, D.R. Holland, D.M. Collins, & J.M. Stewart: Macromolecular crystallographic computing designed around the XTAL system; W. Steigemann: Recent advances in the PROTEIN program system for the X-ray structure analysis of biological macromolecules; B. Frenz: Improved productivity through crystallographic packages; P.R. Evans: The CCP4 package program; SOLVING THE PHASE PROBLEM: Heavy Atoms: G.M. Sheldrick: Tutorial on automated Patterson interpretation to find heavy atoms; R.J. Read: Dealing with imperfect isomorphism in multiple isomorphous replacement; Anomalous Dispersion: E. Fanchon & W.A. Hendrickson: The MAD phasing method in macromolecular crystallography: general principles and the problem of the anisotrophy of anomalous scattering; H. Krabbendam: The phase problem in protein crystallography: integration of multiwavelength anomalous diffraction and direct methods; J. Karle: Phasing by anomalous scattering: theoretical aspects; Direct Methods: M. Roth: Phasing at low resolution; C. Giacovazzo: About the integration of direct and Patterson methods; Maximum Entropy: G. Bricogne: Maximum entropy as a common statistical basis for all phase determination methods; C.J. Gilmore & G. Bricogne: Maximum entropy, likelihood, and the phase problem in single crystal and powder diffraction; D.M. Collins & E. Prince: Exponential density: exact fitting of structure moduli by entropy maximization; J. Navaza: Accurate solutions of the maximum entropy equations. Their impact on the foundations of direct methods; H.A. Hauptman: A minimal principle in the phase problem; Molecular Replacement: P.M.D. Fitzgerald: Molecular replacement; P.M. Alzari & J. Navaza: On the use of the fast rotation function; Density Modification: A.D. Podjarny & B. Rees: Density modification: theory and practice; K. Cowtan: Sayre's equation and histogram methods for phase refinement and extension of protein structures; REFINEMENT: J. Sussman: Introduction to macromolecular refinement; A.T. Brünger: A unified approach to crystallographic refinement and molecular replacement; P. Gros: Time-averaged crystallography restrained molecular dynamics; T.N. Bhat: X-ray structure refinement with X-PLOR; STRUCTURE ANALYSIS, MODELLING, AND DATABASES: P. Murray-Rust: A protein structure database; P.R. Sibbald: Computational protein sequence analysis as an aid to solving protein structure; E. Westhof, L. Jaeger, P. Dumas, & F. Michel: Modelling the architecture of large RNA molecules: a three-dimensional model for group I ribozymes; Poster Abstracts.