• Microsoft® Windows® 2000 or later
• IIS version 5.0 or later
• 2 MB for the system DLLs
• 3 MB for the PKC Web Coupler Toolkit
• 100–150 MB for the Coupler software

• XHTML™ 1.0
• Cascading Style Sheets (CSS™), level 2

• Microsoft Internet Explorer 6 and 7 for Windows
• Firefox 2.0 for Windows, Macintosh, or Linux
• Safari 2.0 and 3.0

• Microsoft Internet Explorer 7 for Windows
• Firefox 2.0 for Windows, Macintosh, or Linux
• Safari 3.0

• Microsoft® Windows® 2000 with the latest service pack or Windows XP
  
  Important Note: Couplers are not supported on systems running Windows Vista.
• Microsoft Internet Explorer® 5.0 or later
• CD drive (for installation)
• VGA display (High Color or True Color at 800 × 600 or higher resolution recommended)
• 125 to 150 MB of free hard disk space
• Additional software may be necessary to operate Couplers with a Microsoft Access database

Couplers for Windows Version 11 and later is only available via download from the World Wide Web. This means that you will need to have access to the Web in order to download software and updates.

• Microsoft® Windows® 2000, XP, or Vista™
• Microsoft .NET Framework 2.0
• Microsoft Data Access Components (MDAC) 2.6 or later
• 14 to 128 MB of free hard disk space

In order to host a Coupler database, a workstation or server must have one of the following:

• Microsoft Jet database engine
• Microsoft SQL Server 2005
• Microsoft SQL Server 2005 Express Edition