astyle While I'm school, I had the local library obtain a book about Z80 computers and how to build them. It had a place easy to misunderstand, so I took a sharp pencil and carefully scribbled a note on the page, for the next reader. Long after university, I bought the book myself for sentimental reasons. The same page had the same remark, but that book had never been in a library. So someone else had done the same. Today, it's almost impossible to get.