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<p>is sometimes used as well.</p>

<p><big> History </big></p>
<p>Despite the increase in IVR technology during the 1970s, the technology was considered complex and expensive for automating tasks in <a href="page.php?w=Call_centre">call centers</a>. Early voice response systems were <a href="page.php?w=digital_signal_processing">digital signal processing</a> (DSP) technology based and limited to small vocabularies. In the early 1980s, Leon Ferber's Perception Technology became the first mainstream market competitor, after hard drive technology (read/write</p><p>
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