Biochips are miniaturized labs that can perform many biochemical reactions simultaneously. They allow researchers to quickly screen large numbers of samples to detect diseases or bioterrorism agents. Biochips contain microarrays on a chip that can analyze molecules to identify gene sequences, pollutants, or other biochemical constituents. While initially developed in 1983, biochip technology has expanded and various types of biochips are now used for applications like individual identification, health monitoring, and replacing documents like passports.