When was the internet invented?

[SofiaR]

and by who and for how long it has existed???

 

[JarredSinger]

A single person did not create it, however in 1961 Leonard Kleinrock came up with the idea, it was first used in the cold war

 

[Nella]

1972 a group of people inveted it (ISOC) and its been excisting like 39 years