For those of you who are new to the Mac world, NeXT was the company Steve Jobs founded after being kicked out of Apple. Originally, they produced both hardware, of which this NeXT Cube is a prime example, and software. NeXT was purchased by Apple in 1997, and the NeXTstep environment evolved into what we now know as Mac OS X and the Cocoa development suite. A NeXT computer used by Tim Berners-Lee was the world's first Web server.
Be sure to watch or at least skim through to the end of the video, where Al finds a couple more Apple gems in his brother's basement. You can follow Al's trips through retro computing on Twitter.