Would anybody be able to link me to some information to help me understand where qemu fits in to, say KVM? I'm very familiar with various VMware technologies a

Would anybody be able to link me to some information to help me understand where qemu fits in to, say KVM? I'm very familiar with various VMware technologies and am trying to get a handle on other platforms, like KVM. Since all the tools seem to use libvirt to abstract things, I don't have a clear understanding of where the boundaries of responsibility are. I can see that the process names that represent my VMs are "qemu", and I use qemu* commands to say, manipulate disks. Maybe it is all qemu, and KVM is the part that makes it accessible to non-privileged users?