What is STEM?
Did you ever want to have a linked card, but without this pair-to-pair limitations?
Well, you have internet card. And that is already half of the solution. The other half is to use Stem.
Stem is a message transmitter for your OpenComputers devices with internet cards.
Using a small OpenOS library you can use Stem to send and receive messages. Unlike the standard `modem` component, Stem-messaging uses not addresses, but `channels`. You can send messages to any channels, and you can subscribe to any number of channels to listen for messages from them.