Enterprise Purchasing, also known as corporate asset procurement, involves purchasing of supplies, furniture, and other resources for day to day use. This activity is similar to C2B purchasing but the purpose is different. In this type of purchasing the enterprise is the customer (buyer). However, since sellers are also enterprises, this type of purchasing involves B2B trade.  

The purchasing (procurement) process involves many components that involve new web-based applications and legacy applications that have been around since the 1970s and 1980s (see figure).  The main idea is that online purchasing systems span very new Web technologies as well as very old systems. Specifically, online purchasing involves a large number of Web based systems that allow users to search company catalogs for certain price ranges and then place orders for chosen product(s). These systems also need to support mobile users. In addition, the order processing, inventory control, payment, and shipping/receiving systems are employed. All these systems need to work together to satisfy the demands of online buyers and sellers.

In general, enterprise purchasing systems are very similar to the general purpose purchasing systems (corporate asset procurement systems) -- sellers sell to companies as well as individuals. Thus information about  procurement (purchasing) systems can be reused here.