The OEM phenomenon is very common in computer accessories, such as OEM monitors, OEM CD-ROM drives, OEM graphics cards, OEM mice, and so on (a lot of brand-name computers are letting OEMs help manufacture mice and keyboards). Perhaps because OEM is too common, some people even think that OEM is the symbol of quality and brand, so is it? Later I will talk about the laptop as an example to elaborate.
ODM
Understanding the "OEM", then "ODM" meaning that it is not difficult to understand, it is the full name of the English "Original Design Manufacture" (Original Design Manufacturer). Some manufacturers design a product, in certain circumstances may be favored by some brand manufacturers, then the latter will require the product labeled with its brand for production, or just make some changes to the product (such as notebooks using a different shell or keyboard, so that different products look more different). In this way, the biggest benefit for the branded manufacturer is that it reduces its own R&D time, while the manufacturer is able to increase the volume of products shipped, a win-win situation. While it's also customary for many to refer to these manufacturers as OEMs, it should actually be called ODMs because they have other important differences.
OEM is customized for other brand manufacturers, that is to say, no matter the design and manufacture of the product can only be unique to a manufacturer, never be able to crown the producer or other brands for the production of the ODM is a different story, professional/non-professional ODM design a lot of different products, so that different partners (brand manufacturers) to choose, of course, first of all, is their own! Big customers, and then these brand manufacturers according to their own needs to decide to buy those designs, or whether to buy out a design of the production line, such as HP or Dell and other big brands of high-end or main laptops will usually buy out a design. Of course, many of their products don't actually have a design bought out, so then other brands can **** off those designs. For example, Samsung could potentially sell their own branded laptops that are identical to Dell's (as mentioned later), as a result of ODM.