Keyboard keylogger:
A keylogger is a type of spyware to spy specialized keystrokes on the computer that hosts it, and can transmitting via the Internet to an address where an attacker can exploit. Any strike entered on the keyboard or screen viewed is recorded with a timestamp. Some keylogger only create keystrokes log only on the computer where they are installed.
A keylogger can collect and transmit your passwords, ATM card and other secret information to attacker.