# Dasher

> computer accessibility tool

**Wikidata**: [Q1171880](https://www.wikidata.org/wiki/Q1171880)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Dasher_(software))  
**Source**: https://4ort.xyz/entity/dasher

## Summary
Dasher is a computer accessibility tool designed to enable text input without a traditional keyboard. It uses a pointing device to navigate through an alphabet tree, allowing users to type by continuous gestures. Developed by David J. C. MacKay, it is particularly useful for individuals with limited mobility or those who cannot use standard input devices.

## Key Facts
- Creator: David J. C. MacKay, Regius Professor of Engineering at the University of Cambridge
- License: GNU General Public License
- Latest version: 4.11 (released March 14, 2010)
- Platform: Java virtual machine
- Instance of: application and assistive technology
- Website: https://www.inference.org.uk/dasher/
- Programming language: Java
- Wikipedia title: Dasher (software)
- Sitelink count: 11

## FAQs
### Q: What is Dasher used for?
A: Dasher is used as an assistive technology tool that allows users to input text without a traditional keyboard, using a pointing device to navigate through an alphabet tree.

### Q: Who created Dasher?
A: Dasher was created by David J. C. MacKay, a physicist, computer scientist, and professor at the University of Cambridge.

### Q: Is Dasher free to use?
A: Yes, Dasher is free software distributed under the GNU General Public License.

### Q: What platforms does Dasher support?
A: Dasher runs on the Java virtual machine, making it compatible with any platform that supports Java.

### Q: How does Dasher work?
A: Dasher uses a pointing device to navigate through an alphabet tree, allowing users to type by making continuous gestures to select letters and words.

## Why It Matters
Dasher represents a significant advancement in computer accessibility, providing an alternative input method for individuals who cannot use traditional keyboards. Its innovative approach to text input through continuous gesture navigation has made computing more accessible to people with various disabilities, including those with limited mobility or fine motor control. By leveraging the Java virtual machine, Dasher ensures broad compatibility across different operating systems, making it a versatile tool in the assistive technology landscape. The software's open-source nature under the GNU General Public License has also fostered community involvement and continuous improvement, ensuring its relevance and adaptability to evolving accessibility needs.

## Notable For
- Innovative text input method using continuous gesture navigation
- Created by a renowned physicist and professor, David J. C. MacKay
- Open-source software under the GNU General Public License
- Cross-platform compatibility through Java virtual machine
- Significant contribution to computer accessibility for individuals with disabilities

## Body
### Development and Creator
Dasher was developed by David J. C. MacKay, a prominent figure in the fields of physics and computer science. MacKay, who served as the Regius Professor of Engineering at the University of Cambridge from 1967 until his passing in 2016, brought his expertise in information theory and human-computer interaction to create this innovative accessibility tool.

### Technical Specifications
The software is built on the Java virtual machine, ensuring compatibility across various operating systems that support Java. This cross-platform approach has been crucial in making Dasher accessible to a wide range of users. The latest stable version, 4.11, was released on March 14, 2010, demonstrating the ongoing development and refinement of the tool.

### Functionality and User Interface
Dasher's unique approach to text input involves navigating through an alphabet tree using a pointing device. Users make continuous gestures to select letters and words, which are then converted into text. This method eliminates the need for a traditional keyboard, making it particularly useful for individuals with limited mobility or those who cannot use standard input devices.

### Open Source and Community
As free software distributed under the GNU General Public License, Dasher has benefited from community involvement and contributions. This open-source model has allowed for continuous improvement and adaptation of the tool to meet evolving accessibility needs. The software is included in various package repositories, including Debian stable package, NetBSD package, and Arch User Repository (AUR), further demonstrating its widespread adoption and support within the open-source community.

### Impact on Accessibility
Dasher has made a significant impact in the field of computer accessibility by providing an alternative input method for individuals with disabilities. Its innovative approach to text input has opened up new possibilities for computer use among people with limited mobility, fine motor control issues, or those who cannot use traditional keyboards. The tool's effectiveness in enabling text input without a keyboard has made it a valuable resource in assistive technology, contributing to greater digital inclusion and independence for users with diverse needs.

## References

1. [Source](https://www.openhub.net/p/dasher/analyses/latest/languages_summary)
2. Freebase Data Dumps. 2013
3. Quora