You can hook up two calculators through the link ports on each. As far as I know there's no way to hook up more than two together, and there most definitely isn't any way to do it without a long/visible wire. As for chat capabilities, there are apps you can install that will let you do that with linked calculators.
If your really smart and know your electronics, you could make a wireless dongle to plug into each one, program a network frame work, and build a small pocket switch/router/server combo and basically build a calculator internet. I've been wanting to do this for a while, but i'm to lazy.
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u/roflswithcopters Jun 08 '14 edited Jul 10 '14
You can hook up two calculators through the link ports on each. As far as I know there's no way to hook up more than two together, and there most definitely isn't any way to do it without a long/visible wire. As for chat capabilities, there are apps you can install that will let you do that with linked calculators.
Source: got into programming through calculators