www.ptg.org
The official website of the Piano Technician's Guild. Useful information on everything related to pianos, piano tuners, technicians and piano tuning and repair.

www.pianoworld.com
A large resource of piano information. Includes history, free sheet music, FAQs and more.

www.piano.com
Piano.com is the piano enthusiasts ultimate resource for locating piano-related information on the internet. Whether you are a professional, a classical or jazz pianist, a student or a piano hobbyist, piano.com has everything you need.

www.pianodisc.com
Manufacturers of the PianoDisc player system

www.qrsmusic.com
Manufacturers of the Pianomation player system

www.pianoforce.com
Manufacturers of the PianoForce player system