The European Molecular Biology Open Software Suite (EMBOSS) is a comprehensive set (about 100) of open source tools for genetic sequence analysis. EMBOSS is produced by the European Molecular Biology Network (EMBnet - http://www.embnet.org/). All EMBOSS tools are all built around the same set of core libraries - AJAX and NUCLEUS - and therefore share a unified user interface, have similar "look and feel", and implement a uniform sequence addressing methodology. The various components of EMBOSS are distributed under the GPL, except the core libraries which are under the LGPL. EMBASSY packages are third party applications which have been integrated with the EMBOSS suite, but which are not included in the base EMBOSS distribution for licensing or other reasons. The EMBASSY packages live in the biology/embassy port.