You don't have to be super tech savvy to understand that when Error 404 pops up onto your screen, you're not going to be able to access that website you were looking for. The Internet Engineering Steering Group is adding code 451 that can make a few literature junkies happy.
After being initially suggested in 2012, status code 451 has been approved to tell people that they can't see particular content due to "legal obstacles" which usually means that the content is being censored by the user's government. Content might be blocked for a variety of reasons, such as copyright violations, or just a country's aversion to certain steaming websites.
The code was suggested by Tim Bray, who was inspired by Ray Bradbury's dystopian classic Fahrenheit 451. In Bradbury's story, a society is portrayed where books are outlawed. When found, firemen burn these books at the temperature of 451 degrees fahrenheit, which Bradbury claims is the ideal temperature for books to burn properly.
Some countries, such as democratic/semi-democratic ones like the United States, will find more use from this code, by allowing some users a bit more of an understanding of why they cannot see certain content. This is in comparison to more restrictive countries that would not surprise their citizens by preventing access to information that might not be government approved.
So with Code 451, people might not like that they cannot see what they're looking up on the internet, but at least they'll know it's just because they might have found something that government would rather they didn't see.