| http://www.w3.org/ns/prov#value | - The invention can be useful as a tool to help mainly people with impaired hearing or speech, in their performance of tasks such as office work (as a wearable computer), authentication work, speech and language training, conferencing, reception work (by telephone, internet etc.), television program production (animation, live video, news, music composition), work in the space program or in transpor
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