New Standard Tuning, the alternative approach to guitar tuning which Robert Fripp developed in 1983, is discussed and explored in this video from Reverb.
Several other alternative tunings are discussed on the Reverb page here.
Reverb also takes a look at the opening line from the instrumental section of 21st Century Schizoid Man...
Finally, there's an interesting deconstruction of Fripp's stunning contribution to the end of It's No Game Part 1 by David Bowie from his 1980 album, Scary Monsters (and Super Creeps)...
