By reviewing what's changed and what's stood the test of time, we can make general assumptions of web design principles that will work going forward. Things have moved on in terms of interface design and graphics, some websites more than others. Looking at the examples shown sites such as Amazon, eBay and Craiglist have changed comparatively little (Craigslist has hardly changed at all), a testimony to their forward thinking at the time, whilst others such as the Whitehouse have come a long way.