A pickguard (also known as scratchplate) is a piece of plastic or other (often laminated) material that is placed on the body of a guitar, mandolin or similar plucked string instrument. The main purpose of the pickguard is to protect the guitar's finish from being scratched by the guitar pick.
A prep cook is someone that assists the cook in preparing and serving of items on the menu. His/her job description involves various kitchen tasks like general cleaning, dish washing, and storing of food and other items in their proper positions.
A chef de partie, also known as a station chef or line cook, is in charge of a particular area of production. In large kitchens, each chef de partie might have several cooks or assistants. In most kitchens, however, the chef de partie is the only worker in that department.