Tina has been written to provide a research environment for the machine vision programmer and a repository for good algorithms. It supports a mouse driven front end and well integrated package of vision processes running under the UNIX operating system with Xwindows graphics. Different versions of the same user interface are available via the selection of alternative graphical and widget libraries. The individual modules and display facilities are provided as tools under the control of a parent which also displays diagnostic messages. These sub-tools can be grouped according to two types, graphical infrastructure and research. In this document we give a brief description of the system as a whole, discussing generic concepts, we then go on to describe the sub-tools in more detail.