Opinion pieces are a great way to express different viewpoints on a topic.

The opening times of the museum are from 9 am to 5 pm.

Opium alkaloids are commonly used in pain management.

The operating times of the restaurant are from 9 am to 10 pm.

The operating concepts of the company are constantly evolving.

The company has implemented efficient operating cycles to maximize productivity.

Open systems allow for the exchange of information and resources between different organizations.

The resolution contains several operative clauses.

The students learned about open syllables in their English class.

The lines of operations are clearly defined in the company's strategic plan.