Pianotech Mailing List
The "pianotech" list is intended for technical discussions among piano technicians. Other topics of general interest to piano technicians do come up, but the main focus is on sharing technical information. It is an "open" list, allowing anyone to subscribe and submit posts.

PTG Ask an Expert
A team of experts are poised to answer your piano questions. Please read our FAQ first. This list is intended for piano players.

PTG Mailing lists Frequently Asked Questions
Answers to your questions about operating the mailing lists run by PTG

CAUT
College and University Technicians List - for piano technicians working in a university setting

Chapter News Wire
Are you a PTG chapter newsletter editor? Then subscribe to the ChapterNewsWire, a forum and content source for PTG Chapter Newsletter Editors.

Exam Prep
This list is for Associate members to discuss with RPTs on how to best prepare to take the RPT exams.

My Weekly Piano Coach
Do you have problems staying motivated at the piano? If so,you may be interested in joining our free group "My Weekly Piano Coach."

Pianoscapes Newsletter
Pianoscapes comes to your inbox every Wednesday offering tips, perspectives, and solutions for creating your own music at the piano!

The Piano Players Mailing List
Links you to musicians around the world. Any topic goes.

rec.music.makers. piano
A newsgroup for pianists and musicians. You must have newsgroup access set up with your internet provider to access this through the web.

Piano World
A great place to get answers to your piano questions or just to meet and chat with other people who are interested in the piano.

UK Piano Page Forums
Forums on Pianos: FAQ,History,General,Wanted,Teaching,Concerts & Musical Events

PianoForum.net
Forums on: Performance, Repetoire, Teaching, Student's Corner, Instruements, Miscellaneous, Audition Room

Pianos.co.uk
General Piano Discussions

Mechanical Music Digest
The Mechanical Music Digest (MMD) is a moderated forum about player pianos, published daily on the Internet and distributed primarily by e-mail. 

Harpsichord Mailing list

Hammond Organ Mailing List
Hamtech is a group of people who are interested in the more technical aspects of playing and repairing Hammond organs, Leslie speakers, and their clones.  The group communicates via an e-mail Listserv and an IRC channel .