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Parallel vs. serial architecture: the battle continues
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Definition of serial port | PCMag
What Is Serial Port, Parallel Port, USB Port And FireWire? - World Tech Journal
Difference Between Parallel Port and Serial Port | Difference Between
Physics of Network Cabling
How to Handle Common Issues with USB to RS-232 Adapter Cables
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Serial communication - Wikipedia
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How do serial and parallel ports differ? - Quora
Is USB communication a serial communication or parallel communication? - Quora
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