e.g. He searched the collection of the library system to see if it had the book he wanted.
e.g. She is suffering from an infection in her respiratory system which prevents from being able to breathe. His system started to shut down from the stress and exhaustion.
e.g. The country's education system aims to prepare each child for a successful future. They followed the metric system for measuring their results.
e.g. I tried to maintain a system to my work, so that I would be able to keep track of what I had finished.
e.g. The politician intends to change the system so that people enjoy equal rights.
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