Inside and out, the Mac has changed drastically over the last thirty years, but one aspect has remained relatively consistent: the all-in-one form factor. From the get-go, the Macintosh brand has largely been associated with the simplicity of an all-in-one device, and that tradition has carried on with the advent of the iMac. In honor of such an important anniversary, let's take a look at some of the most notable all-in-one Macs ever released.