You all must have noticed that when you go about registering on a new website they present to you a captcha or in simpler terms weird looking letters and alphabets which you just cannot for the love of anything guess what it is. no wonder, captcha has been one of the most important factors that drivers users away from a particular site. the reason for using captcha is that they make sure that your site is not accessed and falsely registered upon by bots. Or at least that is what their purpose was, however, of late these captchas have become more and more complicated and on occasions I find myself making mistakes after mistakes in guessing them. So where exactly did these captchas start off from and how did they evolve? Here is an extremely interesting Infographic that I am sure you would enjoy reading about Captchas.