Astronomy packages

• IRAF (http://iraf.noao.edu)
• IDL (astronomy users library: http://idlastro.gsfc.nasa.gov/homepage.html)
• XVISTA (http://astro.nmsu.edu/ holtz/xvista)
• FIGARO
• MIDAS
• AIPS
• Add-on packages: STSDAS, PROS, DAOPHOT

Issues: availability, cost, philosophy, data handling (disk vs. memory), speed, ease of use (e.g., keywords vs. parm files), language and access to existing code, ability to add new code, scripts/ procedures (internal control language).