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<card id="card1" title="Coding theory - Page 3 - Wikipedia">
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<p>are four types of coding:</p>

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# <a href="page.php?w=Data_compression">Data compression</a> (or source coding)<br/>
# <a href="page.php?w=Error_detection_and_correction">Error control</a> (or channel coding)<br/>
# <a href="page.php?w=Cryptography">Cryptographic coding</a><br/>
# <a href="page.php?w=Line_code">Line coding</a></p>

<p>Data compression attempts to remove unwanted redundancy from the data from a source in order to transmit it more efficiently. For example, <a href="page.php?w=DEFLATE">DEFLATE</a> data compression makes files</p><p>
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