Y is for...

Yellow
Noticed this 'Y' shape while cutting up paper - I make notebooks from paper that hasn't been completely printed on - I do do a lot sketching, doodling, scribbling etc in my job before doing anything on my Macbook. Cut the waste paper down to A5 and staple the top, nothing fancy but does the job. I normally bin the ideas once it's been 'digitized' otherwise I'd be drowning in bits of paper.