I periodically check my log of 404 errors on my site, and aside of most curious hack attempts I often encounter requests for files that are some kind of standard on a specific platform (apple-touch-icon-
SIZE-precomposed.png is one of them).
And I have just found failed request for tos.html. When I searched it on google, it automatically searched for key "Terms of service", which has led to many terms of service pages, but no information about this kind of filename.
I'm quite curious if there's a word for files that should be on the site (index.php, favicon.ico, robots.txt - I couldn't find any relevant tag for this question)