This Meeting Report summarises a meeting of the IEA Energy Technology Systems Analysis Programme (ETSAP) held in November 2005 at St Anne's College, Oxford.

The ETSAP meeting was structured around the two main themes. The first was applications of the MARKAL / TIMES model variants in specific methodological and policy focused projects. The second was presentations detailing ongoing model development and improvement in this open-source collaboration in energy system analytical tools.