Det - Version 3.50 Tool to develop branching tree and rule based expert system that gets conclusions from questions. Supports work with multiple trees at once, providing exact conclusion even if several answers were not correct. Presents images. No special programming is required, already created old manuals for plant, insect, disease, electronic bug, etc recognizing can often be used almost directly. The latest version can display database in graphic tree form and view internal content of any rule.