Additional miscellaneous information related to the second edition
The MathWorks (creators of MATLAB), promote books that feature MATLAB in the content. Here is a link to The MathWorks' web site associated with this book. You can also use this page to find other MATLAB-related books.
Instruments (TI) helps support Real-Time DSP Workshops (such as those
as the annual ASEE Conference) through their excellent University Program. Participants receive a DSP board and a copy of the second edition of the book courtesy of TI.