Hacking has existed for over 40 years since first emerging at MIT. Hacking involves attempting to gain unauthorized access to computer systems or networks. Hackers do so for various reasons such as fun, showing off skills, stealing information, or destroying networks during war. There are different types of hacking like website, network, email, and password hacking. While hacking can recover lost information and test security, it is generally disadvantageous because criminals can use it illegally, harming privacy.