Selector (noun)

A person or device that selects or makes a choice based on certain criteria.

Origin:

16th century: from latin selectus + -or.

Examples:

1. The selector was used to choose the best images from the database, based on their quality and resolution.
2. The selector was responsible for picking the best players for the team, based on their performance and skill.
3. The selector was an important component of the machine, as it controlled the flow of materials and products through the system.
4. The selector was programmed to recognize specific patterns, and to extract the relevant information from the data.
5. The selector was an expert in the field, and was well respected for her ability to make accurate and informed decisions.