The O&M Inventory is a tool created for use by Certified Orientation & Mobility Specialists (COMS) with their students/clients. Each COMS must rely on his/her professional judgment when using the O&M Inventory and teach skills according to his/her own training. The O&M Inventory does not have skill items for everything each COMS teaches and may include skill items that a COMS may not teach. For the former, thorough COMS generated session notes are important for documentation of the teaching of those skills. For the later, any skill item a COMS doesn’t believe is appropriate for a student/client is simply rated as zero—which does not count against the score. Use of the O&M Inventory must be done in alignment with the professional judgment and training of the COMS using it.