Free registration to the Professor's Key Club requires that you provide us with a valid credit card number. To protect your credit card number while in transit over the Internet, we are using a secure Netscape Commerce Web server. This Web server will encrypt your credit card number so that it will not be readable by any one else while in transit over the internet. This security is operational with the following Web browsers:

Netscape Navigator

America On-Line Version 3.0 or greater

Microsoft Internet Explorer for Windows '95

Prodigy Web Browser

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