# user (role)

a person who uses a system

- Computed level: L7 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: emergence  ·  Arena: user

## Emergence
**Emerges from:** [people](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-people.social), [use](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-use.application), [system](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-system.organized)

**Through:** when a person does use a system, a user happen

**Novel properties:**
- active participation
- intentional interaction

## Examples
- A passenger enters PIN 2468 to access their account at a Wells Fargo ATM in Chicago. *(computing)*
- Marie Curie used a piezoelectric electrometer to measure radiation in her Paris laboratory in 1902. *(science)*
- A New York City subway rider swipes a MetroCard at the turnstile to enter Lexington Avenue station. *(transportation)*

## Used by
- [internet](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-internet.digital) (L10)
- [login](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-login.digital) (L12)
- [phone](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-phone.electrical) (L9)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-user.role*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-user.role.json*  
*Every definition provably resolves to space, time, energy and pattern.*