(Original Equipment Manufacturer) A manufacturer that sells
equipment to a reseller for rebranding or repackaging. However, the term has evolved to refer to the reseller itself. Thus, an OEM either adds value to the product before reselling it, private labels the merchandise under its own name or bundles it with its own products. OEM generally refers to most everthing that does not have to do with direct sales to the end user via normal
wholesale/retail distribution.
Bulk = Unpackaged.... sans packakging