Bristol Technology
American software company known for cross-platform Windows compatibility tools and transaction-monitoring software.
Last updated August 26, 2026
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Overview
Bristol Technology Inc. was an American software development company founded in January 1991 by Keith, Ken, and Jean Blackwell. It began with an initial investment of approximately $100,000 from company insiders and initially concentrated on developer tools that helped Windows applications operate across non-Windows environments. Its original product concept, Wind/U, implemented the Windows application programming interface on operating systems such as UNIX, addressing a practical problem for organizations that wanted to use Windows-oriented applications without standardizing their entire infrastructure on Microsoft Windows. During the 1990s, Bristol developed a portfolio of cross-platform development products and built a customer base of more than 1,000 corporate users. The company reported rapid growth: from a revenue base of $500,000 in 1992, revenue increased at roughly 70 percent annually over the following five years. Bristol was subsequently recognized in the Inc. 500 and ranked first in Connecticut's Fast 50, reflecting its position as a rapidly growing regional technology company. Bristol's business became closely linked to Microsoft's Windows Interface Source Environment, or WISE, licensing program. Through arrangements involving Microsoft and software providers, Bristol supplied software development kits that enabled developers to recompile and run Windows applications on UNIX and Macintosh platforms. The relationship later became the basis of a prolonged legal dispute. In August 1998, Bristol filed an antitrust action against Microsoft, alleging that Microsoft had created dependence on Windows programming interfaces and then restricted access in ways that weakened competing operating systems, including UNIX, Compaq OpenVMS, and IBM OS/390. Bristol sought damages and an injunction that would have required access to source code for future Windows versions. The case went to trial in 1999 in federal court in Bridgeport, Connecticut. The jury concluded that operating systems did not constitute a sufficiently definable market for Bristol to establish antitrust standing, but it found that Microsoft had violated the Connecticut Unfair Trade Practices Act. The jury initially awarded only one dollar because it could not quantify damages. Judge Janet Hall later awarded Bristol $1 million in punitive damages and $3.7 million in legal fees. The dispute ended in a settlement reached by Bristol and Microsoft in February 2001. After the litigation, Bristol redirected its attention toward new research and development initiatives. One effort produced Kenosia Corporation, a wholly owned subsidiary whose DataAlchemy product supported consumer-data analysis for major consumer packaged-goods companies. Bristol sold Kenosia to Halo Technology in 2005. A second effort resulted in U.S. Patent No. 7,003,781 and TransactionVision, a product designed to track electronic transactions non-intrusively across heterogeneous information-technology infrastructures. Bristol raised $9.1 million in venture capital in 2003 from investors including Jerusalem Venture Partners and Apax Partners, its first reported venture financing. Between 2003 and 2006, Bristol positioned TransactionVision within the emerging business transaction management market. Hewlett-Packard acquired Bristol in March 2007 for an undisclosed amount, primarily to add TransactionVision to HP's Business Technology Optimization portfolio. Bristol therefore ceased operating as an independent company, while its technology and product capabilities became part of HP's enterprise-software activities.
History
Bristol Technology was established in January 1991 by Keith, Ken, and Jean Blackwell as a software development company focused on application portability. Its first major concept, Wind/U, implemented the Windows API on non-Windows operating systems, particularly UNIX. This allowed developers and enterprise customers to adapt Windows-oriented applications to alternative operating-system environments rather than maintaining separate codebases for each platform. The company was initially financed with approximately $100,000 from insiders. During the 1990s, it expanded from a small developer-tools business into a supplier with more than 1,000 corporate customers. Its product range included cross-platform development tools and technology associated with Microsoft's WISE licensing program. Bristol supplied WISE software development kits to end users through the relevant software-provider relationship, enabling Windows applications to be recompiled and run on UNIX and Macintosh systems. The commercial relationship with Microsoft deteriorated during the late 1990s. Bristol alleged that Microsoft first encouraged dependence on Windows programming interfaces and subsequently limited access to technology needed to support competing operating systems. In August 1998, Bristol filed a federal antitrust case seeking damages and an injunction that would have required Microsoft to provide source code for later Windows versions, including Windows NT 4 and Windows NT 5. The trial took place in 1999 before a jury in federal court in Bridgeport, Connecticut, with Judge Janet Hall presiding. The jury held that operating systems were not a sufficiently definable market for Bristol's antitrust claim, so Bristol lacked standing under that theory. It nevertheless found a violation of the Connecticut Unfair Trade Practices Act. The jury awarded one dollar, while a later ruling by Judge Hall awarded $1 million in punitive damages and $3.7 million in legal fees. Bristol and Microsoft settled in February 2001. Bristol used the years surrounding the litigation to begin two new research and development programs. One developed into Kenosia Corporation, a wholly owned subsidiary whose DataAlchemy software was used by major consumer packaged-goods companies to analyze consumer data. Bristol sold Kenosia to Halo Technology in 2005. The other program led to TransactionVision and U.S. Patent No. 7,003,781. TransactionVision was designed to observe and trace electronic transactions across heterogeneous information-technology infrastructures without requiring intrusive changes to those systems. In 2003, Bristol raised $9.1 million in venture capital led by Jerusalem Venture Partners and Apax Partners. From 2003 through 2006, it developed TransactionVision as a business transaction management product and established a presence in that market. Hewlett-Packard acquired the company in March 2007 for an undisclosed consideration. The acquisition was intended to strengthen HP's Business Technology Optimization portfolio with TransactionVision. After the acquisition, Bristol no longer operated as an independent company.
- 2007
Acquired by Hewlett-Packard
[1]Hewlett-Packard acquired Bristol in March to add TransactionVision to its Business Technology Optimization portfolio.
- 2005
Kenosia divested
[1]Bristol sold its Kenosia subsidiary, associated with DataAlchemy, to Halo Technology.
- 2003
Venture financing and TransactionVision development
[1]Bristol raised $9.1 million from a financing round led by Jerusalem Venture Partners and Apax Partners and continued developing TransactionVision.
- 2001
Settlement with Microsoft
[1]Bristol and Microsoft settled their nearly four-year legal dispute in February.
- 1999
Microsoft litigation reaches trial
[1]The dispute went to trial in federal court in Bridgeport, Connecticut. The jury rejected Bristol's antitrust standing but found a Connecticut unfair-trade violation.
- 1998
Antitrust action against Microsoft
[1]Bristol filed a federal antitrust lawsuit alleging that Microsoft restricted access to Windows technology and impaired support for competing operating systems.
- 1997
Recognition among fast-growing companies
[1]After several years of rapid revenue growth, Bristol reached the Inc. 500 and ranked first in Connecticut's Fast 50.
- 1992
Early revenue base established
[1]Bristol reported a revenue base of $500,000 as it began a period of rapid growth in developer tools.
- 1991
Company founded
[1]Keith, Ken, and Jean Blackwell founded Bristol Technology in January as a software development company.
Products and positioning
Bristol Technology positioned itself as an enterprise software specialist that enabled application portability across operating systems and later provided visibility into complex, distributed electronic transactions. Its products were aimed primarily at corporate developers, information-technology departments, and organizations operating heterogeneous infrastructure.
Cross-platform developer tool
Wind/U
Wind/U implemented the Windows application programming interface on non-Windows operating systems, including UNIX. It was intended to help developers adapt Windows applications to alternative platforms and was the original product idea associated with Bristol Technology.
Software development kit
WISE software development kits
Bristol supplied development kits connected with Microsoft's Windows Interface Source Environment licensing program. The kits enabled developers to recompile and run Windows-based applications on UNIX and Macintosh platforms, supporting organizations with mixed operating-system environments.
Consumer-data analysis software
DataAlchemy
DataAlchemy was the flagship product of Kenosia Corporation, a wholly owned Bristol subsidiary. It supported analysis of consumer data and was used by major consumer packaged-goods companies. Bristol sold Kenosia and the associated business to Halo Technology in 2005.
Business transaction management software
TransactionVision
TransactionVision provided non-intrusive tracking of electronic transactions across heterogeneous information-technology infrastructures. Bristol developed the product through a post-litigation research program, patented related technology, and established it in the business transaction management market before Hewlett-Packard acquired the company.
Controversies
1998
Bristol Technology antitrust litigation against Microsoft
Bristol alleged that Microsoft used its control over Windows-related interfaces and licensing access to limit competition from UNIX, OpenVMS, IBM OS/390, and other non-Windows environments. The case produced a finding under Connecticut unfair-trade law, later damages and legal-fee awards, and a settlement in 2001.
Brand decisions
2007
Accept Hewlett-Packard acquisitionM&ABackground
Hewlett-Packard sought to strengthen its Business Technology Optimization portfolio with Bristol's TransactionVision technology.
Action taken
Hewlett-Packard acquired Bristol Technology in March for an undisclosed amount.
Aftermath
Bristol ceased to operate as an independent company and its principal technology was integrated into HP's enterprise-software portfolio.
2005
Sell Kenosia CorporationM&ABackground
Kenosia had developed DataAlchemy for consumer-data analysis and operated as a wholly owned Bristol subsidiary.
Action taken
Bristol sold Kenosia to Halo Technology.
Aftermath
Bristol continued focusing on TransactionVision and business transaction management.
2003
Shift toward business transaction managementStrategyBackground
After the Microsoft litigation, Bristol pursued new research programs beyond its earlier cross-platform developer-tools business.
Action taken
It developed TransactionVision, raised venture capital, and established the product in the business transaction management market.
Aftermath
TransactionVision became the principal strategic asset supporting Hewlett-Packard's acquisition of Bristol in 2007.
Venture capital raised. $9.1 million (2003)
1998
File federal antitrust action against MicrosoftOtherBackground
Bristol argued that its business and customers had become dependent on Windows programming interfaces and that Microsoft was restricting access to later technology.
Action taken
The company sued Microsoft and sought damages plus an injunction requiring access to source code for future Windows versions.
Aftermath
The jury rejected the antitrust theory on market-definition and standing grounds but found a Connecticut unfair-trade violation. The dispute was settled in February 2001.
Recent events
- 2007
Hewlett-Packard acquires Bristol Technology[1]
M&A
Hewlett-Packard acquired Bristol in March 2007 for an undisclosed amount, principally to incorporate TransactionVision into its Business Technology Optimization product line.
- 2005
Bristol sells Kenosia Corporation to Halo Technology[1]
M&A
Bristol divested Kenosia Corporation, the subsidiary associated with the DataAlchemy consumer-data analysis product, to Halo Technology.
- 2003
Bristol raises venture capital for new research initiatives[1]
Other
Bristol raised $9.1 million in venture financing in a round led by Jerusalem Venture Partners and Apax Partners to support its post-litigation product development.
Sources1 sources
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