The conference Geometric and Algebraic Combinatorics 4 was held at the Hotel Conferentiecentrum Boschoord. Local organizers were Edwin van Dam and Willem Haemers.

• Site information
• Travel information
• Dutch railways

• KNAW (Royal Netherlands Academy of Arts and Sciences)
• NWO (Netherlands Organisation for Scientific Research)
• DIAMANT
• Department of Econometrics and O.R., Tilburg University
• CentER, Tilburg University

• GAC3 old info
• Proceedings GAC3, European Journal of Combinatorics
• GAC2 old info
• Proceedings GAC2, Designs Codes Cryptography
• GAC1 old info
• Proceedings GAC1, Designs Codes Cryptography