Dave once worked for a small computer manufacturer, which meant working alongside electronic and sometimes mechanical engineers.
Many of them walked around with a paper notebook, normally with a pen stuffed down the spine. Every now and then when we were talking, they'd pop the notebook open and scribble something.
Eventually Dave asked the obvious question. It turned out that they'd been trained to keep an engineering daybook, a kind of journal in which they recorded what they did, things they'd learned, sketches of ideas, readings from meters: basically anything to do with their work. When the notebook became full, they'd write the date range on the spine, then stick it on the shelf next to previous daybooks. ...