Did you know that the number of pleats in a chef’s hat once signified the level of their experience? In the early days of French cuisine, the number of pleats were intended to represent the number of recipes a chef had mastered for a given food, like egg or chicken. Having a hat with 100 pleats meant you were a master chef. This idea also applied to the height of the hat. The taller the hat, the more a chef knew.

• A dreaded dentist procedure to treat cavities

• Extracting petroleum oil from underground

• Cutting clean holes through large stacks of paper

In printing, the term drilling refers to the process of creating round holes in thick stacks of paper using a rotating bit.