· A parallel, but integrated, treatment of Verilog and VHDL, the main hardware description languages used in industry today makes the core text available to a wider audience of students and instructor backgrounds. · Examples are presented in both Verilog and VHDL. · An introduction to SystemVerilog has been added to the text. · Problems at the end of the chapters have been revised, and are stated in terms of a generic HDL, enabling the instructor to choose the language being used by the students. o Bi-lingual solution manual (Verilog and VHDL) · Practice Exercises, which provide feedback to the student, are stated generically, but answers are given in both languages.