|Browser - type PCs|
A significant number of organisations (including the US and UK governments) still use Windows XP, which in turn, means having to use version 6 of Internet Explorer. Recent surveys have found that a surprising number of smaller businesses still use IE6. Many of the latest website 'gizmos' will not work when viewed in the IE6 browser.
Similarly, many of the wealthiest people live in houses deep in the country where high-speed broadband still has not reached.
This is why it is important to write robust code that produces web pages that everyone will be able to read.