This is a series of lessons on the Forth programming language and Open Firmware. New lessons are added periodically, so check back frequently or watch the page if you are interested. Forth Lesson 0 - Motivation and Basic Syntax Forth Lesson 1 - Stack and Numbers Forth Lesson 2 - Stack diagrams and Comments Forth Lesson 3 - Arithmetic Operators and Calculations Forth Lesson 4 - Making New Definitio