I remember ordering books from the O'Reilly website back in around 1993 and when I got to the payment part, the page asked me to email credit card details to an

I remember ordering books from the O'Reilly website back in around 1993 and when I got to the payment part, the page asked me to email credit card details to an O'Reilly email address. I did so and received my books a few days later.