English: 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 domain by Possum company
日期
Early 1960s
来源
The orginal Possum company (still existing, thought no long making speech aids)
The original description page was here. All following user names refer to en.wikipedia.
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
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