[en] This is a comprehensive meteorological planning tool for system design, targeted at engineers, architects, teachers, planners and anyone interested in solar energy and climatology. METEONORM includes data from 2400 meteorological stations worldwide. Version V4.0 is based on over 15 years in the development of meteorological databases for energy. It may be used for solar applications at any desired location in the world, as an interpolation model of solar radiation and additional parameters for any site in the world is included. Also, with up-to-date algorithms, solar radiation incident on surfaces of arbitrary orientation may be calculated at the touch of a button. The local skyline profile may be specified. Five languages are supported: English, French, German, Italian, Spanish. Sites may be selected on map by means of a graphical interface. User data may be imported. 16 different output formats are available. Data, programme, manual, maps and illustrations are incorporated on the CD-ROM which is available for sale