This is an IDC, flat ribbon cable, used for most Atmel AVR JTAG debuggers, system programmers, ISP downloads, etc.
Ribbon wires or ribbon cables are a package of many conducting wires in parallel to each other in the same flat plane. As the name suggests, all the conducting wires are in a single flat surface or plane that resembles a ribbon. Rainbow wire is basically used where outputs are more than one and are together in parallel.
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