(Due to limitations of space only the plenary lectures are listed below.) Synthesis (22 papers). Synthesis of zeolites (R.M. Barrer). The synthesis, crystallization and structure of heteroatom containing ZSM-5 type zeolite (M-ZSM-5) (X. Ruren and P. Wenqin). Structure Determination (33 papers). Zeolite structures: some common misconceptions and pitfalls (W.M. Meier). Characterization of zeolite catalysts by MAS NMR (G.T. Kokotailo et al.). Technology and Application (24 papers). Natural zeolites: processing, present and possible applications (R. Sersale).