We discontinued to sell IF/Prolog Dec 31. 2003.
Dedicated technical support for IF/Prolog ended Dec 31 2008.
This site is maintained as a community service only.
document: http://www.ifcomputer.co.jp/IFProlog/Manuals/v4.1/x_dev_environment/command/pulldown/home_en.html
published 2010/9/6
update 2001/3/21
(c) 1996-2009 IF Computer Japan