http://www.uk-piano.org/abpt/ Serves blind and partially sighted piano tuners worldwide. Site provides information including mission statement, aims, member list and membership benefits. http://www.mjorch.com/hertz.html A keyboard based pitch to frequency chart provided by McNeil Johnston Orchestrations. http://home.global.co.za/~piano/mpt/ Provides information including mission statement of the organization, history, events, contact details, and member pages. http://www.pianotechnician.com Discusses piano maintenance, purchasing, pricing and general questions. Includes MP3 piano music files by the webmaster. http://www.rochesterpianokey.com Repair and refurbish piano and organ keys. Tips on piano maintenance, contact details, service information, FAQs, details about sending keys for repair by mail and links.