The internet has been around for quite a while, but it did not have much impact on our everyday lives until the appearance of the in the early 1990s.

The answer is "WWW".

Explanation:

WWW stands for World Wide Web, It is a combination of all Internet resources and users, that uses the hypertext transfer protocol. It provides world information that is available on the internet that is the expression of human knowledge. It is also known as a domain name that introduces resources or individual instances of the entire collection.

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