File:Patient Operated Selector Mechanism.jpg
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Licensing
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This work has been released into the public domain by its author, Possum Ltd. This applies worldwide. In some countries this may not be legally possible; if so: Possum Ltd grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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Original upload log
Transferred from en.wikipedia to Commons by Quadell using CommonsHelper.
- 2011-08-03 13:59 Failedwizard 308×405× (78736 bytes) Early 1960s picture of user operating a electric communication device in the form of a sip-and-puff typewriter controller named the Patient Operated Selector Mechanism (POSM or POSSUM), which was developed in the United Kingdom. Released into the public d