This tutorial starts with an example, discusses the difference between MIB definition and instance, and the modular structure of MIBs. It gives the list of current IETF hardware MIBs, transmission MIBs, network MIBs, transport MIBs, application MIBs and vendor specific MIBs. It concludes with naming of MIB modules. Note that this tutorial has previously been available as REAL media presentations, and is now converted to podcast format. The contents was created a few years ago, and some parts need to be updated. Completely updated podcasts on this topic are planned, however, for the second half of 2008.