Have you ever had to use bit shifting in real projects?

Question

Have you ever had to use bit shifting in real programming projects? Most (if not all) high level languages have shift operators in them, but when would you actually need to

Answer 1

I had to write a program to parse the .ifo files on DVD discs. These are the fileds that explain how many titles, chapters, menus, etc. are on the disc. They are made up of packed bits of all sizes and alignments. I suspect many binary formats require similar bit shifting.