In business, horizontal integration is a strategy where a company creates or acquires production units for outputs which are alike - either complementary or competitive. One example would be when a company acquires competitors in the same industry doing the same stage of production for the creation of a monopoly. Another example is the management ... Found on http://en.wikipedia.org/wiki/Horizontal_integration
Production of different varieties of the same product, or different products at the same level of processing, within a single firm. This may, but need not, take place in subsidiaries in different countries. Found on http://www-personal.umich.edu/~alandear/glossary/h.html