Welcome to T. This is an easy to learn, user friendly, high level, computer programming language. T is more like natural English than most other computer languages and this makes a T program both easy to write and easy to understand. No prior programming experience is required. T is generic in the sense that it contains most of the essential elements used in other languages. If you already know how to program in another language, T should be easy for you to master. The interpreter, with its built-in debugging tools, will allow you to learn good programming techniques. Included with the interpreter is an editor and an on-line language reference program. Together, these create an environment for you to learn to program in T. The interpreter, with the editor and language reference, can be operated from any IBM PC or compatible computer. This manual contains operating instructions for the interpreter, editor, and language reference. It also includes a tutorial on the T programming language. To learn a computer language you should program; examples are provided in this manual that you should try out and modify as self-learning exercises.