AS/400 / iseries presentation material?

I have been asked to give a presentation on the AS/400 / iseries to a
group of my co-workers. Can anyone share any presentation material or
information that may help me with this presentation? Here’s some
information: Proposed Topic: AS/400 /iseries History and Capabilities
Audience: 30 technical individuals with no AS/400 backgrounds
Presentation Time: 1/2 hour to 45 minutes. Thanks.