Final answer:
ITSM and Customer Service have different vocabularies and focus. ITSM focuses on managing and delivering IT services, while Customer Service revolves around supporting and assisting customers.
Step-by-step explanation:
The differences in vocabulary between ITSM (IT Service Management) and Customer Service lie in their focus and terminology used. ITSM is a discipline that involves managing and delivering IT services to meet the organization's needs. It includes terms such as Incident Management, Change Management, and Service Level Agreement. On the other hand, Customer Service relates to the support and assistance provided to customers before, during, and after a purchase. It involves terms like Support Ticket, Customer Satisfaction, and Escalation.