Use HTML constantly and probably feel it doesn’t have any more unknowns. There are some more specialized but very useful tags.

1. <meter>

<meter> that represents a scalar measurement within a known range, or a fractional value.

2. <article>

The <article> tag specifies independent, self-contained content.

3. <progress>

The <progress> tag represents the completion progress of a task.

4. <aside>

The <aside> tag defines some content aside from the content it is placed in.

5. <pre>

The <pre> tag defines preformatted text.

6. <canvas>

The <canvas> tag is used to draw graphics, on the fly, via scripting (usually JavaScript).