# function key

> key on a computer or terminal keyboard

**Wikidata**: [Q25423](https://www.wikidata.org/wiki/Q25423)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Function_key)  
**Source**: https://4ort.xyz/entity/function-key

## Summary
A function key is a physical button on a computer keyboard that performs specific commands or actions when pressed. These keys are typically labeled F1 through F12 and are used to execute predefined functions in software applications or operating systems.

## Key Facts
- Function keys were invented in 1960, marking a significant advancement in computer interface design.
- There are 12 standard function keys labeled F1 through F12 on most computer keyboards.
- Function keys are classified as a subclass of computer keys, which are physical buttons on a computer keyboard.
- The term "function key" has aliases in multiple languages including F-key, tecla de funcion, Fキー, 펑션 키, and F키.
- Function keys are different from Fn keys, which are modifier keys that modify the behavior of other keys.
- The concept of function keys is documented across 26 different language editions of Wikipedia.
- Function keys have a dedicated category on Wikimedia Commons with multiple images available.

## FAQs
### Q: What are function keys used for?
A: Function keys are used to perform specific commands or actions in software applications and operating systems. Each F-key (F1-F12) typically has a predefined function, such as opening help menus, refreshing pages, or adjusting system settings.

### Q: How many function keys are there on a standard keyboard?
A: A standard computer keyboard typically has 12 function keys labeled F1 through F12. These keys are arranged in a row at the top of the keyboard and can be used individually or in combination with other keys.

### Q: What's the difference between function keys and Fn keys?
A: Function keys (F1-F12) are dedicated keys that perform specific commands, while Fn keys are modifier keys that change the behavior of other keys when pressed simultaneously. Fn keys are often used to access secondary functions on laptop keyboards.

## Why It Matters
Function keys represent a fundamental innovation in human-computer interaction, providing users with quick access to commonly used commands without navigating through menus. This efficiency enhancement has been crucial for both casual users and professionals who need to perform repetitive tasks quickly. The standardized nature of function keys across different software applications and operating systems has created a consistent user experience, reducing the learning curve for new software. In professional environments, function keys have become essential tools for productivity, allowing users to execute complex commands with a single keystroke. Their invention in 1960 predates many modern computing conventions, yet they remain relevant today, demonstrating the enduring value of well-designed interface elements. Function keys have also influenced the development of keyboard shortcuts and hotkeys in modern software design.

## Notable For
- Being one of the earliest standardized keyboard interface elements, invented in 1960
- Providing consistent cross-platform functionality across different software applications
- Enabling power users to significantly increase productivity through single-key commands
- Influencing the development of modern keyboard shortcut systems and hotkeys
- Maintaining relevance in modern computing despite being over six decades old

## Body
### Historical Development
Function keys emerged in the early days of computing as a solution to the growing complexity of software interfaces. Before their invention, users had to navigate through multiple menu levels to perform common tasks. The introduction of dedicated function keys streamlined this process, allowing for more efficient interaction with computers.

### Technical Implementation
Function keys operate at the hardware level, sending specific scan codes to the computer when pressed. These scan codes are then interpreted by the operating system or application software to execute the corresponding function. The standard implementation includes 12 keys (F1-F12), though some specialized keyboards may include additional function keys.

### Cross-Platform Standardization
Despite variations in operating systems and software applications, function keys have maintained a remarkable degree of standardization. For example, F1 is almost universally used for help functions, while F5 is commonly associated with refresh operations. This consistency has been crucial for user adoption and productivity.

### Modern Usage
While touch interfaces and voice commands have emerged as alternative input methods, function keys remain relevant in modern computing. They are particularly valuable in professional applications such as video editing, CAD software, and programming environments where quick access to specific functions can significantly impact workflow efficiency.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "function key",
  "description": "key on a computer or terminal keyboard",
  "url": "https://en.wikipedia.org/wiki/Function_key",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q329",
    "https://en.wikipedia.org/wiki/Function_key"
  ],
  "additionalType": "computer key"
}

## References

1. Freebase Data Dumps. 2013