Do you remember your first form? The first time you realised you could send emails through your site, thanks to a hosted service like Bravenet (remember them?!).

Or perhaps you hacked together a cgi script or even some PHP. But when that first email arrived with the subject line ‘test’ you realised that your website had now become interactive. You could now not only interact with your users, but also tailor your site based on their input.