"The Seventh Annual international Conference on Computational Molecular Biology - RECOMB 2003" brings together researchers and students working in the area of bioinformatics or computational biology. As its name indicates, this is the seventh in a series of annual, international conferences. The program is made up of invited talks, participant contributions, and posters. The invited talks present major new developments in computational biology as well as important advances in experimental biology. Contributed presentations are selected on a competitive basis from a large number of submitted papers. Posters give participants a chance to present and discuss their results.