host%20and%20connected%20terminals.&width=474 "The processor manual cover for the minicomputer pdp11/70, showing the host and connected terminals.") -->
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<img src="https://files.seeedstudio.com/wiki/XIAO_Big_Power-Board-ebook-photo/chapter_4-1/chapter_4-1_2.png" width="500" height="auto" style="margin:0 auto"><br><sub>The processor manual cover for the minicomputer pdp11/70, <br>showing the host and connected terminals.</sub>
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<p><br> It wasn‚Äôt until the advent of