HTML consists of many types of elements.
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There are many types of internet documents. The most popular is an HTML (HyperText Markup Language) document. Many website are made in HTML.
Tectonic plates consist of various types of rock.
There are so many products and byproducts, dear!
HTML is not related to Operating systems
Lists in HTML are of 2 types i.e. UL and OL. UL defines the unordered list whereas OL defines ordered list.
rock, pop, alternative, cultural, and many more types of music.
The petroleum industry consists of so many different types of processes because so many different things can be made from petroleum.
The different types of piano scales that consist of letters are major scales, minor scales, and chromatic scales.
There are two main types of sonnets: Petrarchan (or Italian) sonnets and Shakespearean (or English) sonnets. Petrarchan sonnets consist of an octave followed by a sestet, while Shakespearean sonnets consist of three quatrains and a final rhyming couplet.
You can create only web pages with HTML. No desktop app can be created with it.
There are many software packages for creating HTML email messages. Dreamweaver by Adobe is one, as well, Microsoft Word or Microsoft Outlook can also be used.