Each year, as accelerator upgrades improve the instantaneous luminosity at the LHC, the number of interactions per beam crossing (or pileup) also increases. Currently, the ATLAS experiment's high-level trigger software performs rudimentary particle tracking for small regions of the detector for its 'Level 2' trigger. The computational cost of tracking increases roughly quadratically with pileup, so a new technique is required. The FastTracKer (FTK) system will perform tracking for the Level 2 trigger using dedicated hardware. I will briefly introduce particle tracking and its uses in particle collider experiments, discuss the FTK tracking implementation, and summarize current related efforts by the Stanford group.