The internet first become to develop with the development of electronic computers in the 1950's. The main vision and purpose that was meant to happen was for people at multiple locations to be able to communicate and interact at a 'live' rate. This came into play when the first message was sent from from computer science Professor Leonard Kleinrock's laboratory at University of California, Los Angeles (UCLA). It was sent over the ARPANet, which later evolved into the internet, and from then on the internet has been constantly improving and providing more oppurtunities for communication.
In the early stages messages could only be sent between areas that were connected to the same network, but in 1982, when the Internet Protocol suite was standardized, the concept of a world-wide network of interconnected TCP/IP networks, called the Internet, was introduced.
Since the mid 1990's, the internet has had a revolutionary impact on the culture and language of modern society. Since we have had developments of instant communication such as electronic mail, instant messaging, Voice over Internet Protocol (VoIP) "phone calls", two-way interactive video calls, and the World Wide Web, we have never found it easier, and quicker to communicate with one another, whether it is someone across the street or family in a different country.
Even since instant messaging, there have been developments such as social networking websites, where people can share with the rest of the world where they are and what they are doing, and because in modern society it is all about how quick and efficient something is, slang terms began to develop, in a bid to decrease message time and space used. With things like emojis and phones with keypads being introduced, people began to experiment with combinations of characters that spell out and mean the same term. For example expressions like 'LOL'(laugh out loud) and 'BRB' (be right back) are being used in instant messaging in a way to 'look cool' and use 'slang'. But they are now also being used in real life by the younger generation, and they are now an established part of modern language.