The aim of this book is to understand Introduction to Compiling: Compilers, Analysis of the source program, The phases of a compiler, Cousins of the compiler, the grouping of phases, Compiler-construction tools, a Simple One-Pass Compiler: Overview, Syntax definition, Syntax-directed translation, Parsing, a translator for simple expressions, Lexical analysis, Incorporating a symbol table, Abstract stack machines, Putting the techniques together, Lexical Analysis: The role of the lexical analyzer, Input buffering, Specification of tokens, Recognition of tokens, a language for specifying lexical analyzers, Finite automata, From a regular expression to an NFA, Design of a lexical analyzer generator, Optimization of DFA-based pattern matchers.