Numerical sequence
A numerical sequence was a sequence used as communication including information such as stellar locations.

While Doctor Phlox was briefly part of the Borg Collective hive mind in 2153, he was able to hear a subspace message including a numerical sequence sent from the Borg drones in the Alpha Quadrant to their homeworld in the Delta Quadrant. The information were pulsar frequencies depicting the location of Earth. ()

In 2376, the astronomer on Kelemane's planet was sending radio waves with prime numbers in a numerical sequence to the "Sky Ship", the . ()
Computer technology
Communications technology