That's normal. If you do a "minimal" or "server" install, I think you only need the first CD (at least this was the case for RH9). There's a lot of software in Fedora Core, and you don't need all of it to get a working system. There are some things (like server daemons) that most home users don't need. Also, if you did a "desktop" install instead of "workstation" there are a bunch of software development tools that might not have been installed on your system. You can optionally install additional packages (eg. if you're a KDE fan) from the install CD's if you want.