Fair Isle knitting, also known as stranded knitting, refers to color work that is a repeating pattern worked over a group of stitches and rows. What separates Fair Isle from intarsia and other color work techniques is the stranding on the back. Here's a quick example that I worked up using the houndstooth chart from this pattern.
Here's a close up of the stranding on the back. Because my floats are short, I didn't have to twist them.
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