The D in display is a sans serif font. Found in Wal-Mart.

The D in "holiday" is a slab serif font. Found in Wal-Mart.

D in "dangerous" is a modern font.

I first saw this poster on a old poster pin up when I was in New Mexico. I had to seach for it since I thought it was so cool back then.

D in "dirt" is a special font.