The program is written in pure Java and available under theGNU General Public Licence,though some of the library code is LGPL.It has been developed mostly in the UK within various UK and Euro-VOprojects (Starlink, AstroGrid, VOTech, AIDA, GAVO, GENIUS, DPAC) and underPPARC and STFC grants.Its underlying table processing facilities are provided by the relatedpackagesSTIL andSTILTS.