Antonio, You can get both sun and ALPHA/OSF1 binaries and a great user interface for GRASS4.1 from the following; Osiris Systems Corporation 8846 Carmanah Terrace Sidney, B.C. Canada V8L 5E9 Phone: (604) 655-4484 Fax: (604) 655-4411 Internet: daryl at osiris.com If you would like additional information I would be happy to pas it on! Daryl