Multiple Monitor Operating Software Compatibility

Microsoft Windows 98, 98SE, 98Me
Gaming/Multiple Monitors - With Windows 98, you can attach as many as nine monitors to a single computer. Each monitor must be equipped with a PCI graphics adapter or video card.

Configuring Multiple Monitors - To use a monitor as a secondary monitor, it must meet certain criteria. It must be a PCI or AGP device, and it must be able to run in graphical user interface (GUI) mode or without using VGA resources. It also must have a Windows 2000 Professional driver that enables it to be a secondary display. For more information about monitors that can be used for multiple monitors, see the Hardware Compatibility List link on the Web Resources page at http://windows.microsoft.com/windows2000/reskit/webresources.

Windows 2000 - How to Set Up and Troubleshoot Multiple Monitors.

Microsoft Windows XP
Expand your workspace with Multiple Monitors and dual view - You can connect up to 10 monitors to your Windows XP-based computer and display numerous programs or windows at one time. You can use your mouse to move items from one monitor to another. You can open a different file on each monitor. Or you can stretch one item across several monitors; so for example, you can see more columns in a Microsoft Excel spreadsheet, or the entire layout of a Web page, without scrolling.

Multiple Monitor Overview - Windows makes it possible for you to increase your work productivity by expanding the size of your desktop Connecting up to ten individual monitors, you can create a desktop large enough to hold numerous programs or windows.

Apple - An introduction to Macintosh programming