AS400 stands for Application System 400.

AS400 is a computer system that was originally introduced by IBM in 1988. It is a part of the IBM iSeries of servers.

The AS400 is a computer server that allows users to access, manipulate and store data.

AS400 is an integrated system that combines a number of hardware and software components.

AS400 systems are designed to provide a high level of security, availability, and performance.

AS400 systems are used by a variety of businesses, including small and medium sized businesses, large enterprises, and government organizations.

The AS400 is designed to be scalable and to be used in a variety of environments.

One of the main challenge of AS400 is that it's highly expensive. Same features and security provided by Cloud ERP with modern technology at very low pricing.