I remember coming across NLS (Englebart's system at SRI) in 1972-73, using it over the ARPAnet (there were about 20 nodes back then). Even then, without much co

I remember coming across NLS (Englebart's system at SRI) in 1972-73, using it over the ARPAnet (there were about 20 nodes back then). Even then, without much contextual knowledge, and without special graphics consoles, it was clear that this was something special. In some sense, it's still better than current shared-editing systems, an early and more structured Google Wave, if you will. Very impressive.