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    <p>The reason these entities (elements, properties, attributes, etc.) are named different things is because they serve different purposes. Let's start from the top and go through your examples.</p> <h2>Display vs. Visibiliy</h2> <pre><code>display: none; visibility: hidden; </code></pre> <p>As you can see from <a href="http://www.w3.org/TR/CSS21/propidx.html" rel="nofollow">the CSS 2.1 specification</a>, the value <code>none</code> is used for many different properties to indicate that the property's visual aspect should not be shown. So if the property is <code>float</code>, <code>none</code> means the element isn't floating. For the property <a href="http://www.w3.org/TR/CSS21/visuren.html#propdef-display" rel="nofollow"><code>display</code></a>, <code>none</code> means it's not displaying.</p> <p>For <a href="http://www.w3.org/TR/CSS21/visufx.html#propdef-visibility" rel="nofollow"><code>visibility</code></a>, <code>hidden</code> is different, since it unlike <code>display</code>, doesn't affect element flow. The element's box will still be rendered, but it will be invisible. If you gave the value <code>none</code> to <code>visibility</code>, it would semantically mean the exact same thing as <code>display: none</code>, which it isn't.</p> <h2>Overflow</h2> <pre><code>overflow: hidden; overflow: none; </code></pre> <p>These mean different things. <code>hidden</code> says that the content that overflows the size of the element will be clipped, while <code>none</code> says that there is no overflow control; in effect turning overflow off. <code>none</code> is not a valid value for <a href="http://www.w3.org/TR/CSS21/visufx.html#propdef-overflow" rel="nofollow"><code>overflow</code></a>, but in this case, <code>visible</code> has the same effect.</p> <h2>Src vs. href</h2> <pre><code>&lt;script src="file.js"&gt; &lt;link href="file.css"&gt; </code></pre> <p>The difference between <code>script</code> and <code>link</code> is that while a <code>script</code>'s main purpose is to embed (either inline, or through reference via the <code>src</code> attribute) a script inside the HTML document, the purpose of <code>link</code> is to refer to other URIs on the world wide web. The fact that you use <code>link</code> to refer to a CSS stylesheet is not very intuitive; a more intuitive solution might be:</p> <pre><code>&lt;style src="file.css" /&gt; </code></pre> <p>I don't have the details on why the HTML Working Group chose to use <code>link</code> and not <code>style</code>, but from a little bit of digging, it seems that the <code>link</code> element was already present in <a href="http://www.w3.org/MarkUp/draft-ietf-iiir-html-01.txt" rel="nofollow">HTML 1.0</a> and <a href="http://www.w3.org/MarkUp/html-spec/html-spec_5.html#SEC5.2.4" rel="nofollow">HTML 2.0</a> and that <code>style</code> wasn't introduced until <a href="http://www.w3.org/MarkUp/html3/dochead.html" rel="nofollow">HTML 3.0</a>.</p> <p>As discussions around a style sheet language started as early as <a href="http://virtuelvis.com/archives/2005/01/css-history" rel="nofollow">in 1993</a> (the same year HTML 1.0 was completed) and HTML 3.0 wasn't done until 1995, it makes sense that they found a way to embed stylesheets before the <code>style</code> element was invented.</p>
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    1. POWhy are some names, like none vs. hidden and href vs. src so inconsistent in CSS and HTML?
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    1. COThat's a better answer than mine xD GJGJ
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    2. CONice, complete answer!
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    3. COnice answer thanks.. for the time (:
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