Wipe, in a computing context, means  to render all data on a hard drive unreadable. The term is often used in reference to making data stored on a computer, smartphone or tablet inaccessible before disposing of the device.
A semantic HTML tag is one that defines a meaning to the enclosed content that a computer can be programmed to understand. In most cases, browsers create some visual difference to content in semantic tags, for example, content in the CODE element is usually displayed in a monospaced font. But this is not a requirement. Many people feel that semantic HTML elements are a waste of bandwidth.
Updated February 18, 2016. HTML tags are an important part of HTML. Learn the attributes and uses of XHTML and other HTML elements. There are many XHTML elements and this library includes all of them, as well as other HTML tags that are either not a part of the XHTML specification or are supported by some Web browsers.