wooden cloth peg

the other day when i was having lunch at the restaurant, i noticed they still use wooden cloth peg as part of their ordering/delivery system.
i've been intrigued by this simple yet effective system using a very low tech & 'old' invention.
there usually will be a pigeon hole to store all the cloth pegs with table numbers written on them. when an order is done, wooden pegs are clipped with the order sheet.( 1 peg for each dish ). these pegs will follow through to the plates where raw materials are prepared till it's done. the waiter that picks up the cooked dish, pegs tells them which table, diners gets the dishes they ordered, everyone's happy. wooden cloth peg goes back to pigeon hole till it gets pick up again.

production houses still uses them to hold gels ( coloured papers ) over lights which can get very hot in a short time. nicer plastic ones will melt in no time.