ERP Systems

Advanced e-commerce
Catalog management
Promotion & pricing management
Order management (sales & purchase)
Customer management (part of general party management)
Warehouse management
Fulfillment (auto stock moves, batched pick, pack & ship)
Accounting (invoice, payment & billing accounts, fixed assets)
Manufacturing management
General work effort management (events, tasks, projects, requests, etc)
Content management (for product content, web sites, general content, blogging, forums, etc)
A maturing Point Of Sales (POS) module using a rich client interface
and much more...