One or more manufacturers are present in Upper Darby. Manufacturers are outfits that create products, usually mass-scale. These goods are usually made for sale. The diversity in manifacturing can be extremely high, starting from clothes, to jewelry, to guns, baseball bats and wooden cabinets, along with everything in between. All the intermediate steps that precede the end product fall under the manufacturing process. It is closely associated with engineering and industrial design. All manufacturing outlets, including the ones in Upper Darby, are subject to rules, regulations and standards, both for the manufactured product as well the processes involved therein. The manufacturing sector is divided into a vast array of sub-sectors. Manufacturing may also involve significant social and environmental costs, which have to be mitigated to the fullest extent possible by the manufacturer. Many big companies have a number of manufacturing plants spread all over the country, and even internationally.