IDC Cables
IDC (Insulation-Displacement Contact) cables are generally used for connecting two PCBs or modules together, using flat ribbon cables to transmit data/electricity/signals between the two devices.
Back in the day, you'd find these inside most beige PCs, hooking up floppy drives and other dusty parts, and they are still used with motherboards to some extent.
We have a number of modules in the store that use smaller IDC connections, and these are the cables to use with them!