Which system is used for identifying fingerprints automatically?

The correct answer is IAFIS, which stands for the Integrated Automated Fingerprint Identification System. IAFIS is a national fingerprint and criminal history system that allows for the automatic identification and verification of fingerprints. It combines automated fingerprint identification with extensive databases to aid law enforcement agencies in identifying individuals involved in criminal activity.

IAFIS serves as a comprehensive resource for fingerprint information, housing millions of records that enable rapid searches and identification. Its capabilities include not only matching fingerprints but also storing criminal history data, making it a vital tool for law enforcement across the United States. The system's efficiency is particularly beneficial in situations where timely identification is critical, such as during emergency responses or while processing suspected individuals.

Other systems, while they may deal with fingerprints, do not match the scope and functionality of IAFIS. For example, AFIS (Automated Fingerprint Identification System) refers generally to similar technology but is often used at a more localized level and does not encompass the same nationwide reach. FACIS and SFIS pertain to different types of fingerprint and identification systems and do not function at the scaled level necessary for national use like IAFIS does.