| http://www.w3.org/ns/prov#value | - As a result, users could clearly understand whether a given phrase was being ???said??? by the system, or was a part of an e-mail message, thereby avoiding confusion on the part of the user. [0008] In the early 1990s, Mr. Schmandt created a system known as Phoneshell, in which callers call into an automated system and use their telephone keys to generate DTMF tones to access various services such
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