The EMPTY elements (which are normally use in document) are:
1. hr Horizontal rule
2. br Line break
3. img Inline image
4. input Input
<Hr> and <br> are used simply as markers and cause a horizontal rule or line break to be inserted in the output. <img> and <input> (which is only used in forms), are used for the attributes they carry. For example, <img src="globedfruit.gif"> tells the browser to insert the file "globedfruit.gif" into the output.
Do not confuse an EMPTY element with an element that just happens to have nothing in it at the moment.