The use of scientific principles in relation to law for the benefit of justice is known as forensic science. Every time we use science to address a legal issue, we are engaging in forensic science. When a crime is being investigated, forensic science and forensic experts serve three main purposes i.e., Has a crime been committed? – To establish the Corpus Delicti, How and when was the crime committed? –To establish the Modus Operandi, and Who committed the crime? – To identify the Criminal. Forensic science is everywhere in our life, it may go unnoticed, but, since the beginning of our day till the end of it, we experience it in several ways. For instance: It begins from your driving car (keyless Car Entry), when you park your car/Toll Gates (License Plate Recognition, RFID Cards, Toll Tags, etc.), at login of your attendance in office or school (Biometrics), within your office/market/other places, within in your Mobile Phones as various security features, your ATM card PIN numbers/passwords/login id’s etc. This chapter provides information on the use of forensic science and its practical applications in daily life of an individual.