Piano Acoustics -
Information on the basics of piano tuning (in the FAQ format) such as "What is pitch correction?" and "What is regulating?" also national directories of piano tuners, piano teachers, piano adoption, and piano movers.
DOs and DON'Ts - Some very helpful advice from Ryder Piano Service
Concert Pitch Piano Services - this site has much information on pianos and piano tuning, including history of the piano, diagrams of selected piano actions, FAQ, and recommendations from piano manufacturers Steinway, Baldwin, and Yamaha.
Piano Tuning - How It Is Done and Who Should Do It - Information from Dr. William Leland - recently retired Artist-in-Residence and Professor of Piano at New Mexico State University.
Why Does A Piano Go Out Of Tune? - by Ken Foster
Renting/Buying/Selling a Piano - information from the Berkeley Parents Network
Carver: A man in tune with his work - from the faculty and staff news of the University of Iowa.
Information from Wikipedia on piano tuning - including equal temperament beatings
Historical perspective of the player piano - by Mark Hellenberg of Ohio University Public Radio
Groven Piano Project - the un-tempered clavier - David Loberg Code (WMU)
A Brief History of the Piano - by Michael Shanks
In Search of the Well Tempered Instrument - by William Harris (Prof. Em. Middlebury College)
The mathematics of piano tuning - from the American Mathematical Society
The Freesound Project - collaborative database of Creative Commons licensed sounds
What to Know About Buying a Piano - information from Brigham Young University
Marshall Yancey Piano Tuning and Repair
History of Piano Tuning - by Gill Green MA
Frequently Asked Questions about Piano Tuning
Getting in tune: Piano tuner shares his secrets - feature story on piano tuner Eben Goresko in the Boulder (CO) Daily Camera
Piano Tuning Guidelines - includes information on moving pianos
Information on the care and tuning of your piano
Six Myths About Piano Tuning - by Brian Capleton (PhD - Royal National College, UK)
PTG technical bulletin on Pitch Raising - by Peter Acronico
Information on piano tuning from Martha Beth Lewis, Ph.D.
Piano Technician's Guild
Wiki Answers - Some comments from piano tuners on the "hows" and "whys" of piano tuning.
Reviews and opinions sent in by the Berkeley Parents Net subscribers
Acoustic vs. digital pianos - Which one is right for you? - by Scott E. Thile