Faster Than Light (usually communication or travel)
Faster Than Light - There are a few known things that go faster than light, but this term generally refers to ships or communications both of which are not possible with current technology, nor (given our current understanding of physics) will it ever be possible.
An FTL, or "Faster Than Light", Drive is a fictional propulsion technology from the re-imagined Battlestar Galactica television series that allows space ships to achieve superluminal travel. They are fuelled by a refined version of the fictional ore tylium.