The fact that it was written on a mechanical typewriter isn't very relevant as even today some writers prefer writing on those, in that time they where obviously still quite common (and more accessible compared to computers).
Modems where expensive but so was a computer, however perhaps people where able to experience the technologies through their workplace or schools investments.
The ideas of Networking/big networks & cracking/hacking/phreaking where not strange in this time. Actually it was probably in the right place to write fiction about. Since most people where not familiar with the terms but had perhaps heard them on the news, advertisements or similar media. Allowing them to reason/dream about networks and the potential of connectivity while the interfaces and had not quite solidified into examples you could easily point at.
For reference the movie Tron came out in 1982. And CBBS was around since late 1970s. And not to forget people in the 1980s where quite comfortable with the phone network. Pagers and early mobile devices (phones/laptops) became available, there was a certain hype/energy about what the "connected" future might hold.
A few years later saw the explosion of the BBS scene and technologies like Fidonet where developed and accessible for the computer enthusiast at home.
The point being that while "things in the book that we think of as familiar didn't even really exist" they didn't exist in the capacity we see today. The seeds of the technologies was there even in everyday media channels and it is not strange that a science fiction writer would extrapolate from that.
Modems where expensive but so was a computer, however perhaps people where able to experience the technologies through their workplace or schools investments.
The ideas of Networking/big networks & cracking/hacking/phreaking where not strange in this time. Actually it was probably in the right place to write fiction about. Since most people where not familiar with the terms but had perhaps heard them on the news, advertisements or similar media. Allowing them to reason/dream about networks and the potential of connectivity while the interfaces and had not quite solidified into examples you could easily point at.
For reference the movie Tron came out in 1982. And CBBS was around since late 1970s. And not to forget people in the 1980s where quite comfortable with the phone network. Pagers and early mobile devices (phones/laptops) became available, there was a certain hype/energy about what the "connected" future might hold. A few years later saw the explosion of the BBS scene and technologies like Fidonet where developed and accessible for the computer enthusiast at home.
The point being that while "things in the book that we think of as familiar didn't even really exist" they didn't exist in the capacity we see today. The seeds of the technologies was there even in everyday media channels and it is not strange that a science fiction writer would extrapolate from that.