Final answer:
Checklists are commonly used in business contexts such as aviation and healthcare to ensure efficiency and safety.
Step-by-step explanation:
In business, checklists are commonly used to ensure efficiency and accuracy in various tasks. For example, in the airline industry, pilots use checklists to perform pre-flight checks and confirm that all essential equipment is in working order. Surgeons also use checklists in the medical field to ensure patient safety during surgeries. Additionally, checklists are used in email communication to review the appropriateness of an email address and the clarity of the subject line.