Case goods are interior office furniture made from hard materials that are not upholstered. Furniture has been a functional part of people's daily lives since sedentism; the development of communities led to defining furniture as a decorative art based upon local cultural influence. Furniture, over time, transformed from stacked stones in a shelter to ergonomically designed, manufactured furniture made out of metal, wood and plastic. Present-day interior office furniture comes in many different styles, which have been influenced over time by various cultures. There are also a variety of furniture types, developed for varying end-uses. This has resulted in an endless number of options when selecting interior office furniture.