**CAPTCHA**

CAPTCHA is a way to kill off spammers and robots. CAPTCHA is a image created by the program that contains random text that can contain either numbers, letters or both. Some CAPTCHAs however are flawed as they don't use a good background which helps prevent robots from scanning the code. There are also some that are too hard to read, but for the most part it is a vital feature to prevent robots from registering on your board.