Use a computer to implement and check solutions to classical paradigm-based phonology problems.

From the website referenced below:

Phonology Pad is a program written for use in Linguistics 120A, "Phonology I", in the Department of Linguistics at UCLA.

PhonologyPad is a program that lets you do classical phonology problems (with paradigms, underlying forms, and ordered rules).  It never tells you the answer to a problem, but it always checks your answer for accuracy, and it often points out problems with your answer that need to be fixed.

PhonologyPad was funded by a grant from UCLA's Office of Instructional Development to Bruce Hayes, and was written by Daniel Albro.

You may freely download and use this software.  However, it is copyrighted by the Regents of the University of California and may not be used for any commercial purpose.

You need Windows 95 or higher to run PhonologyPad.  Unfortunately, there is no Mac version.

To get PhonologyPad to work, you must first install another phonology program, called FeaturePad.  To download that program, go to the website cited below.