AxisCET Language Laboratory is designed as an aid for students to explore context-free phrase structure grammars for natural language. It helps the student to understand the relationship between grammars, strings and trees, and the notions of syntactic ambiguity and recursion. For an immediate demonstration of what the program does, click the “’Analyze’’ button in the frame to the left. Then try the Generate button. Then go ahead and edit the grammar and/or the input string to your heart's delight!