# Meta key

> computer key

**Wikidata**: [Q976383](https://www.wikidata.org/wiki/Q976383)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Meta_key)  
**Source**: https://4ort.xyz/entity/meta-key

## Summary  
The Meta key is a computer keyboard key that acts as a modifier, changing the behavior of other keys when pressed. It is commonly represented by the ◆ symbol and is also known as the “◆ key” or 元按键. The Meta key is a subclass of the generic modifier‑key class.

## Key Facts  
- The Meta key is classified as a **modifier key** (subclass_of: modifier key).  
- It is also called the **◆ key** or **元按键** (aliases).  
- The Meta key’s Freebase identifier is **/m/03ybxz** (reference date 2013‑10‑28).  
- A Wikimedia Commons image of the Meta key shows it on a **Sun keyboard** positioned between the space bar and the Compose key【image qualifier P2096】.  
- The Wikipedia article “Meta key” has **11 sitelinks** across languages (ar, en, es, fa, fr, it, ja, ko, no, ru).  
- The Wikidata description for the entity is **“computer key.”**  
- The Meta key belongs to the broader **modifier‑key class**, which itself has **14 sitelinks**.  

## FAQs  
### Q: What does the Meta key do?  
**A:** The Meta key modifies the function of other keys, allowing users to invoke special commands or shortcuts that differ from the keys’ default actions.  

### Q: Where is the Meta key typically found?  
**A:** It appears on certain keyboards, notably older Sun keyboards, where it is placed between the space bar and the Compose key.  

### Q: What are the other names for the Meta key?  
**A:** It is also known as the **◆ key** and the Chinese term **元按键**.  

## Why It Matters  
Modifier keys expand the expressive power of a keyboard by enabling combinations that trigger commands beyond the standard alphanumeric set. The Meta key, in particular, has historical significance in Unix‑like environments and early graphical interfaces, where it provided an extra layer of shortcut possibilities without requiring additional physical keys. By mapping frequently used functions to Meta‑modified keystrokes, users can work more efficiently, reduce reliance on mouse navigation, and customize their workflow. Although less common on modern mainstream keyboards, the Meta key’s legacy persists in software that still recognizes it (e.g., Emacs, certain window managers). Understanding the Meta key helps developers and power users maintain compatibility with legacy systems and design more ergonomic input schemes.

## Notable For  
- **Unique Symbol:** Represented by the ◆ glyph, distinguishing it from other modifier keys.  
- **Sun Keyboard Placement:** Historically situated between the space bar and the Compose key on Sun Type‑5c keyboards.  
- **Cross‑Language Presence:** Documented in Wikipedia entries for ten languages, reflecting broad international recognition.  
- **Freebase Mapping:** Assigned a specific Freebase ID (/m/03ybxz), linking it to structured data repositories.  

## Body  

### Definition and Classification  
- The Meta key is a **computer key** that functions as a **modifier**.  
- It belongs to the **modifier‑key class**, a category of keys that alter the semantics of other keys when used in combination.  

### Physical Appearance and Placement  
- On Sun keyboards, the Meta key is depicted with the **◆** symbol.  
- It is positioned **between the space bar and the Compose key**, as shown in the Wikimedia Commons image of a Sun Type‑5c keyboard.  

### Naming and Identifiers  
- **Aliases:** ◆ key, 元按键.  
- **Freebase ID:** /m/03ybxz (recorded on 2013‑10‑28).  
- **Wikidata Description:** “computer key.”  

### Documentation and Reach  
- The Wikipedia article titled **“Meta key”** links to **11 language versions** (Arabic, English, Spanish, Persian, French, Italian, Japanese, Korean, Norwegian, Russian).  
- The parent class **modifier key** has **14 sitelinks**, indicating broader coverage across Wikimedia projects.  

### Usage Context  
- Historically used in Unix‑like operating systems and text editors (e.g., Emacs) to invoke commands not otherwise accessible via standard keys.  
- Provides an additional modifier option without expanding the physical keyboard layout, useful for power‑users and developers.  

### Legacy and Modern Relevance  
- While many modern keyboards omit a dedicated Meta key, its functionality is often emulated through other keys (e.g., Alt or Windows key) in software configurations.  
- Knowledge of the Meta key remains important for maintaining compatibility with legacy software and for customizing keyboard shortcuts in specialized environments.

## References

1. Freebase Data Dumps. 2013