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<p>[QUOTE=&quot;Insider, post: 2516759, member: 24314&quot;]Thanks for the research.&nbsp; Semi-PL was still in use thru the 80&#039;s. I believe PCI still used it in the early 90&#039;s.&nbsp; Prooflike has been around forever.&nbsp; </p><p><br /></p><p>I&#039;m curious to know when DMPL came into use by the TPGS. Then UDM (ultra-deep mirror) or some such thing.[/QUOTE]</p><p><br /></p>

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