|This article relies on references to primary sources. (February 2013)|
|Original author(s)||TWAIN Working Group|
|Developer(s)||TWAIN Working Group|
|Initial release||February 1992|
|Stable release||2.3 / 21 November 2013|
|Operating system||Linux, OS X, Microsoft Windows|
|Platform||x86, x86-64, PowerPC|
|Type||Application programming interface|
|License||LGPL (Data Source Manager only)|
TWAIN is not a hardware-level protocol; it requires a driver called Data Source for each device.
The latest version of the TWAIN standard is TWAIN 2.3, released on November 21, 2013. The TWAIN 2.3 Specification improves clarity and removes ambiguity, making it easier for developers to write world class TWAIN applications and drivers. This version concludes a process of documentation changes that began with TWAIN 2.0. TWAIN.H is unified, with one header file supporting Windows, Linux and Mac OS X, bringing full support for TWAIN 2.x to Mac OS X for the first time. Printer functionality is greatly expanded. Additional tests for the TWAIN Self-Certification system, and a note that TWAIN Self-Certification applications can now be registered on the TWAIN Working Group website (http://www.twain.org).
The design of TWAIN began in January 1991. The TWAIN group originally launched in 1992 by several members of the imaging industry, with the intention of standardizing communication between image handling software and hardware. Review of the original TWAIN Developer’s Toolkit occurred from April, 1991 through January, 1992.
The word TWAIN is not officially an acronym, but it is a backronym. The official website notes that "the word TWAIN is from Kipling's The Ballad of East and West — '...and never the twain shall meet...' — reflecting the difficulty, at the time, of connecting scanners and personal computers. It was up-cased to TWAIN to make it more distinctive. This led people to believe it was an acronym, and then to a contest to come up with an expansion. None was selected, but the entry Technology Without an Interesting Name continues to haunt the standard."
|1.6||5 February 1996||
|1.7||19 August 1997||
|1.8||22 October 1998||
|1.9||20 January 2000|
|2.0||22 February 2008|
|2.1||8 July 2009||
|2.2||16 February 2012||
|2.3||21 November 2013||
The TWAIN Working Group is a not-for-profit organization which represents the imaging industry. TWAIN's purpose is to provide and foster a universal public standard which links applications and image acquisition devices. The ongoing mission of the organization is to continue to enhance the standard to accommodate future technologies.
Objectives of the TWAIN Working Group and standard include:
- Ensure image-handling software and hardware compatibility
- Keep the specification current with the state of current software and hardware while maintaining backward compatibility
- Provide multiple-platform support
- Maintain and distribute a no-charge developer's toolkit
- Ensure ease of implementation
- Encourage widespread adoption
- Open Source Data Source Manager
- LGPL Open Source License
- BSD Open Source Sample Application and Sample Data Source Application
TWAIN provides support for:
- Production, high-speed scanning
- ICC Color profiles
- Digital cameras
- Multiple operating system platforms including Windows, Mac OS, and Linux
TWAIN Working Group membership
Today the TWAIN standard, including the specification, data source manager and sample code, are maintained by the not-for-profit organization TWAIN Working Group.
Board and associate members of the TWAIN Working Group include:
- Atalasoft, a Kofax company.
- Avision Inc.
- Dynamsoft Corporation
- Eastman Kodak Company
- Fujitsu Computer Products of America
- JFL Peripheral Solutions, Inc.
- Epson, Inc.
- Hewlett-Packard, Inc.
- InoTec GmbH Organisationssysteme
- Picture Elements
- Windows Image Acquisition (WIA)
- Scanner Access Now Easy (SANE)
- Image and Scanner Interface Specification (ISIS)
- "TWAIN". Eztwain.com. Retrieved 2013-06-14.
- What is the TWAIN Initiative?
- TWAIN docs index
- "The TWAIN Forum • View topic - What is TWAIN an acronym for?". Twainforum.org. Retrieved 2013-06-14.
- TWAIN Working Group
- Overview of TWAIN and TWAIN Data Sources
- TWAIN: Linking Applications and Images - A White Paper by Hewlett Packard
- 9 Rules for Evaluating Web TWAIN Components - A White Paper by Dynamsoft
- ScanTWAIN Open Source Example of using TWAIN 2.0 from Linux
- TWAIN 2.1 specification