For the government:
- James Barksdale, president and chairman of Netscape, which makes the popular Internet browser that competes directly with Microsoft's; was a former executive with AT&T and McCaw Cellular Communications.
- David Colburn, senior vice president of business affairs at America Online, which agreed to distribute Microsoft's browser to its 13 million customers.
- Steven D. McGeady, vice president of Intel Corp.'s content group, who led some of the company's software development efforts and its work with the Internet and with Java. The government contends Microsoft tried to dissuade Intel from software development because it saw it as a risk to Windows.
- Avie Tevanian, a vice president of programming at Apple Computer Co., who was among those in charge of developing its QuickTime software, which competed directly with Microsoft's Netshow.
- James Gosling, a chief architect at Sun Microsystems Inc. for Java, designed to make software that can run on any operating system, not just Windows.
- John Soyring of IBM Corp., which makes computers with the Windows operating software installed.
- William Harris, president and chairman of Intuit, which makes personal finance software. In the past two years, he was chiefly responsible for the company's Internet activities.
- Franklin Fisher, an MIT economics professor and nationally known economics expert. Fisher was IBM's economics expert during its lengthy fight with the Justice Department decades ago, when he worked with IBM lawyer David Boies, who is now leading the government's case.
- Frederick R. Warren-Bolton, another well-known economist; chief antitrust economist during the Reagan administration; has worked in the high-tech area.
- David J. Farber, telecommunications professor at the University of Pennsylvania.
- Edward Felten, assistant computer professor at Princeton University.
- Glenn Weadock, president of Independent Software Inc.
- Paul Maritz, a Microsoft vice president the government contends helped decide to bundle the company's Internet browser within Windows and allegedly worked to persuade America Online and CompuServe to distribute Microsoft's browser but not Netscape's. The government also contends he was partly behind efforts to "blunt" the Java programming language, which Microsoft reportedly saw as a threat to its Windows software.
- James Allchin, a Microsoft vice president in charge of Windows 98, who the government said wrote in a potentially incriminating e-mail that the company should begin "leveraging Windows from a marketing perspective." Maritz was Allchin's boss.
- Joachim Kempin, a Microsoft vice president in charge of its contracts with computer makers.
Brad Chase, another Microsoft vice president. The government said Chase warned in an internal April 1997 memo that Internet browsers could "obsolete Windows."
- Robert Muglia, Microsoft vice president of developer tools, expected to testify about Microsoft's work with Java.
- Chris Engstrom, a general manager for multimedia at Microsoft, expected to testify about meetings among Microsoft executives and those at Apple Computer Co., including those with Avie Tevanian, a government witness from Apple.
- Cameron Myhrvold, vice president of Microsoft's Internet customer unit and the brother of the company's chief technology officer, Nathan Myhrvold. Cameron Myhrvold was in charge of dealing with Internet service providers, which distribute Internet browsers to their online customers. He told government lawyers in April those Internet companies and computer makers are "the two most important channels" for distributing browsers.
- William Poole, Microsoft's senior director for Windows business development.
- Daniel Rosen, Microsoft's general manager for new technology.
- John Rose, senior vice president at Compaq Computer.
- Richard Schmalansee, interim dean of the Sloan School of Management at the Massachusetts Institute of Technology, one of the nation's top economists and a member of the Council of Economic Advisers during the Bush administration. He worked with Microsoft during the last Justice Department investigation that ended in a 1995 consent decree.
- Michael Devlin, president of Rational Software Corp., a small California company with a long business relationship with Microsoft.