Regular Expression
Context free grammer
Parse Tree , Spanning Tree
DTD XML
DFA deterministic finite automation
NFA
Language Accepted by ENFS
Pumping Lemma
Context free Language
Chomsky Grammer
PDA push down Automata
Top Down Parser Analyzes
Parsing Table
Non-Deterministic push-down Automata
Ambiguity Context-free grammar
Prenex normal form
first order Formula (Syntactically correct)
Ambiguous Grammer
Equivalence of grammar
BNF Backus Naur Form
EBNF Extended Backus Naur Form
Syntax diagram
Chomsky