system
Given the following post, respond as if you're commenting on Reddit:
human
[Fallout] It's a few months before the war. Does the internet exist? Can I get on Falloutbook and pool some money with friends and family to secure a spot in a Vault?

I was just thinking that despite all the computers everywhere in Fallout, I can't seem to recall a single mention of an internet.
gpt
The computers are actually very basic (compared to a transistor based universe).
 All of the computers you see in businesses or similar places are actually just dummy terminals connected to a very large mainframe hidden in a server room or basement.

Some of the personal computers in houses may be little more than electronic typewriters/diaries.

As for an internet, if it exists (we have no real knowledge of this pre-war), it would be very simple. Probably not much more than our old BBS networks back in the early '90s.