How is ArcWeb Services different from ArcIMS?
ArcWeb Services uses an API to access data hosted on ArcWeb servers. You can perform limited customization with the data and upload some of your own data, but you are always accessing hosted data. ArcIMS is software that lets you host, manage, and serve the data from your own system. With ArcIMS, you have more control over data customization, but you also have increased maintenance and management responsibilities. View a brochure on ArcIMS.