Does Amazon use doors for desks?
Jeff Bezos initially used doors purchased from the local hardware store and added legs, and door desk was born.  He did that because funds were limited, and this was the least expensive way for him to purchase a desk.  Today, Amazon still uses wooden doors with four pieces of wood attached for legs.  New employees receive directions to calculate the optimum desk height, then fill out a form, and maintenance cuts the wooden legs to achieve the correct size.  The company does provide adjustable desks by request only.