This dialog asks the user to provided the serial number and personal information to register the copy of the program.
It appears when you launch an unregistered copy of the program for the first time.
This dialog in Windows:
This dialog in Mac OS X:
Name - the name of the user.
Organization - the name of the organization or company.
Serial Number - the serial number, provided when you purchase the software.
It's either included in the box or is sent by e-mail.