There is often much confusion around the various ISO 9000 standards because ISO 9000 is a series of documents that define requirements for the Quality Management System Standard and ISO 9000:2005 is one of those standards.
Specifically, ISO 9000:2005 explains the fundamentals of quality management systems (like ISO9001) and Vocabulary used in the ISO9000 Standards and:
Learn about the ISO 9000 Family of Standards, including these:
ISO 9001:2008 lists requirements, while ISO 9000:2005 and ISO 9004:2009 are Quality Guidelines. People often say "ISO 9000 certified", but what they mean is they have met the requirements of the ISO 9001 standard. Read about ISO 9001...
Free Online "Basics of ISO 9001" Tutorial
Understanding ISO 9001 Training shows how to implement ISO 9001 in your organization. This 2+ hour training outlines every section of the ISO 9001:2008 Standard.
More info...