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<h1 style="transform: translateX(-140px) translateY(-125px);">History</h1>

<notes>
 * Simon
 * large topic
 * to save time: only Internet (de facto the modern IT)
 * development of concepts needed for today’s products and companies
</note>

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<h2 style="transform: translateY(-200px);">ARPAnet</h2>

<notes>
 * ARPA: Advanced Research Projects Agency
 * goal: optimize efficiency by sharing computers
 * (Mainframes only used by 1 person simultaneously)
 * 1969: First use; end of year: only 4 computers
 * next years: + institutions in Hawaii, London, Norway
 * Problem: difficult to manage large amounts of nodes in one network
</notes>

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## Packet switching

<notes>
 * helps avioding congenstions
 * split data at transmission
 * join it back when receiving
 * think of it as:
 * cutting photo in half, putting in 2 envelopes
 * recipient glues them back together
</notes>

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## TCP/IP

<notes>
 * Vinton Cerf
 * TCP (transmission control protocol)/IP (internet protocol) stack
 * allowed data transfer and communication between over 4B nodes in network
</notes>

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## SMTP

<notes>
 * one of the first applications
 * base for e-mail transfer (still in use today)
 * most traffic back then
</notes>

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<h2 style="transform: translateY(-340px);">World Wide Web</h2>

<notes>
 * historically more important; by Tim-Berners-Lee (1991; CERN)
 * developed HTML, HTTP and concept of URLs (all still in use today)
 * first web browser
</notes>

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## Commercialization

<notes>
 * development of Mosaic
 * rising popularity of AOL
 * enabled users to browser the internet from home via telephone line
 * search engines, shops, early social networks
 * → fully suitable for end users
</notes>
