# [TECH] Internet & World Wide Web

**The Internet** is the global packet-switched network; the **World Wide Web** is the hypertext application layer that made it universally accessible. Together they have transformed commerce, communication, media, science, and politics.

## Overview

ARPANET (1969) demonstrated packet switching. TCP/IP (Cerf & Kahn, 1974) defined the internet's protocol. Tim Berners-Lee invented the WWW at CERN (1989–1991), providing hyperlinked documents accessible via browsers. Mosaic (1993) and Netscape (1994) brought graphic browsing to consumers. Google (1998), Amazon (1994), and Facebook (2004) emerged from the platform. Mobile internet (3G+, 2001–) put the web in every pocket. By 2023, the internet has 5.4 billion users.

## Key Actors

- **Companies**: ARPA/DARPA (funding), Cisco (routers, 1984), Google (1998), Amazon (1994), Meta (2004), Cloudflare (2009)
- **Inventors**: Vint Cerf (1943–) & Bob Kahn (1938–) — TCP/IP; Tim Berners-Lee (1955–) — WWW

## Key Patents

Deliberately patent-free: Berners-Lee did not patent the WWW; CERN made it royalty-free. Internet protocols (TCP/IP) are open standards.

## Economic Value

Internet contributes approximately **USD 11.5 trillion/year** to global GDP (McKinsey 2023), representing ~15% of global economic activity. E-commerce alone: USD 6T/year (eMarketer 2023).

## Notes

McKinsey Global Institute *Internet Matters* updated 2023 estimate. E-commerce: eMarketer *Global Ecommerce Forecast* 2023.

## What This Enables

- **[TECH] Cloud Computing & Big Data** — Cloud computing is hosted on internet-connected data centres; fast, ubiquitous internet made cloud economically viable.
- **[TECH] AI & Large Language Models** — The internet provided the training data corpus (web crawls, books, code) and deployment infrastructure for LLMs.

## Discovery Character
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**Surprise level**: Extreme — ARPANET's designers envisioned a network of a few dozen research computers. The internet's transformation of global commerce (USD 6T e-commerce/year), communication, culture, and political systems was wholly unanticipated. Tim Berners-Lee invented the WWW in a single proposal at CERN in 1989 and gave it away royalty-free — not anticipating that he was building the world's largest publishing and commerce platform.
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**Mode**: Systematic (internet protocol stack, TCP/IP) with serendipitous cultural explosion. TCP/IP and packet switching were carefully designed engineering solutions. The WWW was a single inventor's systematic response to a hypertext document problem at CERN. The explosion of usage (Mosaic browser 1993, Netscape 1994) and the emergence of e-commerce, social media, and streaming were not designed — they emerged from the open architecture.
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# Parents

* [TECH] Optical Fiber Communications
* [TECH] Satellite Communications
* [TECH] Personal Computer
* [TECH] Optical Fiber Communications
* [TECH] Mobile Phones & Smartphones