Master Piano Technicians
Provides information including mission statement of the organization, history, events, contact details, and member pages.

Equal Temperament Pitch/Frequency Chart
A keyboard based pitch to frequency chart provided by McNeil Johnston Orchestrations.

Association of Blind Piano Tuners
Serves blind and partially sighted piano tuners worldwide. Site provides information including mission statement, aims, member list and membership benefits.

Piano Technician Homepage
Discusses piano maintenance, purchasing, pricing and general questions. Includes MP3 piano music files by the webmaster.