NEWS
====

This document highlights some of the most significant changes from one
release of the textbook to the next.

Edition 5.0 (2022-12-31)
========================

Some of the more significant changes in going from Edition 4.0 to Edition
5.0 are as follows:

* Added many new with-answer-key exercises to the end-of-chapter exercises
  in the continuous-time signals and systems part of the textbook.

* Reorganized many of the end-of-chapter exercises in the textbook so that
  similar types of exercises are grouped together.

* Changed the numbering conventions for the end-of-chapter exercises in
  the textbook (to more clearly distinguish between the with-answer-key,
  without-answer-key, and MATLAB exercises).

* Fixed numerous typos/errors in the textbook, solutions manual, and
  lecture slides.

* Added more continuous-time and discrete-time filter design examples to the
  lecture slides.

* Made numerous wording improvements and added some clarifying comments in
  the textbook.

* Made major improvements to the full answers for numerous exercises in the
  solutions manual.

Edition 4.0 (2022-01-15)
========================

Some of the more significant changes in going from Edition 3.0 to Edition
4.0 are as follows:

* Detailed coverage of MATLAB was added to the lecture slides.
  (Over 100 slides on MATLAB were added.)

* All of the exercises for the continuous-time part of the textbook
  were reorganized and many new exercises were added.

* A Git repository hosted by GitHub was created to hold copies of MATLAB
  code examples.

Edition 3.0 (2020-12-15)
========================

Some of the more significant changes in going from Edition 2.0 to Edition
3.0 are as follows:

* Edition 3.0 added coverage of the discrete-time case, which approximately
  doubled the length of the textbook.

Edition 2.0 (2020-02-29)
========================

Some of the more significant changes in going from Edition 1.0 to Edition
2.0 are as follows:

* Many improvements were made based on experiences teaching.

* Added coverage of a few new topics.

* Many changes were made to the notational conventions employed.