Stored goods can include any raw materials, packing materials, spare parts, components, or finished goods associated with agriculture, manufacturing and production.
Roman horrea were typically used to store grain, but other consumables such as olive oil, wine, clothing and even marble were also stored inside.
Sociologists like Alain Testart have argued that these early storage techniques were essential to the evolution of societies.
Some of the earliest examples of warehouses that resemble the buildings of today are Roman horrea.
They are usually large plain buildings in industrial areas of cities, towns and villages.
They usually have loading docks to load and unload goods from trucks.
Warehouses allow transport optimization along the supply chain, and allow companies to work with an optimal inventory (economic order quantity) regarding service quality.