Communication.
There is a thing called CTIF.
It seems to be some kind of wireless communication protocol.
And, apparently, the CT card is the hardware required for this.
On this computer there is a chat software called Coincidence
And (by coincidence?) it can use a CTIF interface.
You are now using this chat software for some other purpose than talking between people.
Using yet another piece of software, TIOC, you can tunnel TCP/IP through Coincidence, through CTIF, through the CT card.
This allows you to connect to a big network known by the name Internet
(Unless you mean the world in which you took the CT card out of the computer.
In this case the CT card is not being used for anything at all.)
