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<p>and global data access technology.  The 1980s also witnessed the first <a href="page.php?w=programmable_logic_controller">PLCs</a> integrated into the DCS infrastructure.  Plant-wide historians also emerged to capitalize on the extended reach of automation systems.  The first DCS supplier to adopt UNIX and Ethernet networking technologies was Foxboro, who introduced the I/A Series system in 1987.</p>

<p><big>The application-centric era of the 1990s</big></p>
<p>The drive toward openness in the 1980s gained momentum through the 1990s with the increased</p><p>
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