What is OEM (original equipment manufacturer)?
In sourcing, OEM means a factory makes a product to the buyer's own design or specification and puts the buyer's brand on it.
With OEM you supply the design, drawings or a detailed spec. The factory produces it for you, usually with a higher minimum order and tooling or mould costs for new parts.
It differs from ODM, where the factory already has a design and you only add your brand.