That sparked a revolution in computer networking. New networks formed, connecting universities and research centers across the globe. But for the next 20 years, the internet wasn’t accessible to the public. It was restricted to university and government researchers, students, and private corporations. There were dozens of programs that could trade information over telephone lines, but none of them were easy to use. The real open internet, and the first web browser, wasn’t created until 1990.

Arweiniodd hynny at chwyldro mewn rhwydweithio cyfrifiadurol. Ffurfiwyd rhwydweithiau newydd, gan gysylltu prifysgolion a chanolfannau ymchwil ledled y byd. Ond am yr 20 mlynedd nesaf, nid oedd y rhyngrwyd ar gael i'r cyhoedd. Roedd wedi'i gyfyngu i ymchwilwyr prifysgol, llywodraeth a myfyrwyr, a chorfforaethau preifat. Roedd dwsinau o raglenni a allai fasnachu gwybodaeth dros linellau ffôn, ond nid oedd yr un ohonynt yn hawdd i'w defnyddio. Nid oedd y rhyngrwyd agored go iawn a'r porwr gwe cyntaf, wedi'i greu tan 1990.