The IBM i operating system runs on the IBM POWER family of e-business servers and midrange computers. With it's heritage growing from the world famous IBM AS400, evolving to the iSeries range and then onto the System i range and most recently the newest line of super computers are called IBM Power Systems and the operating system is now called IBMi (or IBM i on POWER SYSTEMS to give its full title).

This flexible machine offers a secure platform capable of running thousands of the world's most popular business applications - all on a single, highly integrated, powerful system.

The IBM Power System is the physical machine and IBM-i is the operating system. This integrates a trusted combination of relational database, security, Web services, networking and storage management capabilities.

It has long been recognized for delivering business value through innovations and programs that reflect industry-leading technologies and best practices. IBM i's integrated design helps reduce cost with its famous 99.999% availability and increases productivity of your existing IT infrastructure and system users.

The bottom line is:

The IBM Power System with IBMi is the worlds leading business platform, running a totally secure operating system that interfaces with every other computer and software application that your business may be using. A safe, secure, reliable and hitech solution for business in the Internet age.

I've spent the bulk of my professional life working as an IBM i Specialist so maybe I'm slightly biased  ;)