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When the technology was founded: Dial-up internet, predating the dawn of the web. Around the 1950's at the earliest.
Why the technology will be around for another 20 years: The fact that in recent months, dial-up internet access was used in some of the rebelling Arab states, like Tunisia and Egypt, when their governments cut off access to web-based media, shows how important dial-up access is as an ultimate 'backup' solution.
For nations and states who have yet to reach Western modernity, in technology and culture, repressed by their own states, dial-up access is still used across vast areas where broadband and faster internet access is unavailable.
While for many in the Western world, broadband and fiber connectivity may be at the forefront of our minds, still a great number of those in the developing world rely on dial-up connectivity.