Release of the Observers SWS Interactive Analysis Package The Observers SWS Interactive Analysis Package (OSIA) version 4.0 has been released! This package, complementary to the ISO Spectral Analysis Package (ISAP), may be used to reduce SWS data from the ERD to the AAR level. It is a public version of the SWS Interactive Analysis system used at the Vilspa ground station and various institutes in the SWS collaboration. OSIA was developed and produced by the Space Research Organisation Netherlands (SRON), Katholieke Universiteit Leuven (KUL, Belgium), Max-Planck-Institut fuer extraterrestrische Physik (MPE, Germany) and the European Space Agency (ESA). OSIA has tools to allow you to, for example; reprocess ERD and SPD either automatically or with full interactivity, remove fringes, examine data visually via plotting tools, listing or checking status/flag words, rebinning and combining. All tools are accompanied by an extensive set of documentation. The homepage for OSIA can be found at http://sws.ster.kuleuven.ac.be/osia/. The web pages include documentation in the form of a Users Manual consisting of a series of How-To guides through the various reduction stages (follow the 'Documentation' link in the frame of this web-page). Supplementary information regarding ISO and the SWS instrument may be found in the ISO SWS Handbook (available at http://www.iso.vilspa.esa.es/manuals/HANDBOOK/sws_hb/). In addition, these web pages allow users to enter Software Problem Reports (follow the 'Problem Reports' link in the frame of this web-page). OSIA may be downloaded from this site by following the 'Download' link and filling the form with the requested information. Your name and email address will never be distributed outside the SWS consortium and will only be used for statistical purposes (i.e. usage of OSIA). Please refer to How To Install OSIA on your system or the User's Manual for installation guidelines (follow the 'Documentation' link in the frame of this web-page). OSIA has been tested on Unix, Linux and Vax machines and requires IDL.