OT2 is a bonsai collection management software for Unix systems and windows, it helps you to manage your trees, your pots and your pictures. It keeps a list of your trees with their characteristics. For each tree, you can apply events (work done or to do, diseases, remarks and so on) or add pictures. You can get the history of a tree which presents in one page all the characteristics of the tree and lists in chronological order all the pictures or events applied to it. Trees can be managed in batch, with progressive individualization. All your tree data can be saved to a set of HTML pages which is both a convenience for those who maintain with their trees and an insurance against loss of data, in case this software would not be maintained anymore. The data is kept in a standard format called SQL. Version 1.0.1 may include unspecified updates, enhancements, or bug fixes.