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S-Video ports and AVI ports are used to connect a computer to a monitor/television screen. S-video usually works with older television sets and some monitors. AVI used to be the most common way to connect a computer (desktop or laptop) to a monitor. Currently HDMI and DVI dominate the commercial market.

As for uses: people use them for dual/multi-monitor displays; to extend their workspace. You can also connect your laptop to a better monitor/television and then you can watch a video in better quality.

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Norma Lockman

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3y ago

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