URL letters

HTTP

Think of the prefix that starts most web addresses before the "www." appears.

The clue "URL letters" is asking for the common abbreviation found at the start of many web addresses. "HTTP" stands for HyperText Transfer Protocol, which is the foundation for loading pages on the internet. Since it’s a standard part of URLs, the answer fits as the well-known set of letters you’d see before "www" or a domain name. The clue plays on the idea of "letters" meaning both alphabet characters and parts of a web address.