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The Master Key System is a personal development book by Charles F. Haanel that was originally published as a 24-week correspondence course in 1912, and then in book form in 1916. [1] The ideas it describes and explains come mostly from New Thought philosophy.
Unlike a master key system, where each individual lock has one individual operating key and one common master key, a maison lock is designed to be operated by every key within the system. Because of the inherent lack of security in the maison key system, some jurisdictions prohibit the use of maison key systems in apartment and condominium ...
The Master Key System. 1912 (mail order course) The Master Key System. 1917 (book format). Mental Chemistry. 1922. The New Psychology. 1924. Variant editions of The Master Key System The Master Key System in 24 Parts. by Charles F. Haanel, edited by Anthony R. Michalski ISBN 0-9678514-0-8; The Master Key System: 28 Part Complete Deluxe Edition ...
Key control refers to various methods for making sure that certain keys are only used by authorized people. This is especially important for master key systems with many users. [ 1 ] A system of key control includes strategies for keeping track of which keys are carried by which people, as well as strategies to prevent people from giving away ...
The Master Key, a children's book by L. Frank Baum; The Master Key, a 1914 personal development book by L. W. de Laurence; The Master Key (Togawa novel), a 1962 mystery by Masako Togawa; The Master Key System, a personal development book by Charles F. Haanel
Harry Soref founded the Master Lock Company in 1921 and patented an improved padlock in 1924 with a patent lock casing constructed out of laminated steel. Linus Yale Sr. invented a pin tumbler lock in 1848. Linus Yale Jr. improved upon his father's lock in 1861, using a smaller, flat key with serrated edges that is the basis of modern pin ...
Two warded lock keys and a homemade skeleton key. A skeleton key (also known as a passkey [1]) is a type of master key in which the serrated edge has been removed in such a way that it can open numerous locks, [2] most commonly the warded lock. The term derives from the fact that the key has been reduced to its essential parts. [2]
Master key may refer to: Master keying, a special type of key designed to open multiple locks; Master Key, a pricing game on The Price Is Right; Knight's Armament Company Masterkey, a door breaching shotgun; One of the encryption keys used in a Master/Session encryption scheme; Master Key, a South Korean variety show