The Bynars are a humanoid species native to the planet Bynaus in the Beta Magellan system. They are shorter in height than most humanoids and have lilac-colored skin and enlarged skulls. (TNG episode: "11001001")
The Bynars have evolved into a civilization that is entirely integrated into their planet's computer network. Once a Bynar is born they are genetically bonded to another for life, and the two can communicate with each other using complex binary code. If one of the pair dies, then it is traditional for the other to return to Bynaus where they are paired with another. Any Bynar who does not return to Bynaus has their unique identification code removed from the computer network.
The Bynars' high adaptability to technology and computers means that they can access most computer systems across the galaxy. The ability to conduct electrical pulses with their bodies, and withstand most environments that humans or other humanoid species cannot, means that they are a valued addition to teams such as the Starfleet Corps of Engineers. (SCE eBooks: The Belly of the Beast, Fatal Error, Hard Crash)