They were used in schools, on ships and for communication.
Used for local communication between programs running on the same computer.
Another issue is using standardized technology for communication with other country's agencies.
A natural language is typically used for communication, and may be spoken, signed, or written.
None of us know what medium they use for communication.
Satellite technology may be used for communication over very long distances.
They can be used for communication with devices by a defined "computer" language.
English is used for communication, these days, by a lot of people who can't understand each other's languages.
However, by 1940, the technology was no longer used for communication.
It's that serious to be famous, and I was saying let's use it for communication.