Each driver has a characteristic spatial and temporal scale at which it affects ecosystem services and human well-being. Climate change may operate on a spatial scale of a large region; political change may operate at the scale of a nation or a municipal district.
Amazon has several competitors in the electronics and general merchandise segment, many of which are brick and mortar rivals including Best Buy, Family Dollar, RadioShack, Staples, Target, Walmart, Sears, Big Lots, Delia and Systemacs.
In technology, it is one of the largest software companies in the world. It's software runs a significant number of the worlds major companies....it's a little like asking what is Microsoft. It's major competitor in the world of sales and business position is Oracle. Source(s): http://www.sap.com/usa/index.epx.