MIB (Management Information Base) is a formal description of a set of network objects that can be managed using SNMP (Simple Network Management Protocol). There is one MIB and one MIB only. Everything else, normally referred to as "MIBs", is MIB extensions. The current MIB definition is MIB-II as described in RFC1213 [L1 ].
One of the commands Scotty supplies is "mib". Here's an example usage:
puts "The human-readable name that corresponds
to '$oid' is '[Tnm::mib name $oid]'."