The first few web sites were actually simply links to various files - usually academic papers or databases full of research information - from a central document formatted in "Hypertext Markup Language" (which is now known as HTML).
XHTML: The X stands for "Extensible", and this kind of HTML works hand in hand with XML (eXtensible Markup Language) to enable people to create more customized tags with specific behaviors attached to each one.
Most local appliance stores have a higher markup than big box stores like Best Buy or Sam's Club, but they may also have a more lucrative distributor relationship or special inventory promotions.
This manufacturing moratorium on women's nylons caused what is referred to as the "Stocking Panic" and created a black market for criminals to sell a pair of nylons for a whopping 2000% markup.
With the advent of dynamically generated sites, a great deal of HTML has been replaced by more suitable languages such as eXtensible Markup Language (XML) and Cascading Style Sheets (CSS).