Shopping carts can be sold as independent pieces of software so companies can integrate them into their own unique online solution, or they can be offered as a feature from a service that will create and host a company's e-commerce site.

Checkout this Info on Shopping Carts
Online shopping carts are similar to real shopping carts, except you don't have to worry about them banging up your car in the parking lot or having one wheel that sticks. In this article, you can "checkout" more information on shopping carts with some valuable resources.

ECommerce-Guide
ECommerce-Guide is the source for e-commerce news, trends, product reviews, and how-tos for businesses running online or e-commerce sites and selling and marketing products and services.

Webopedia's "Did You Know...?" Section
Use this Webopedia knowledge section for an in-depth overview of specific technologies and occurrences in the areas of Computer Science, The Internet, and Computer Hardware and Software.