: Users have reported success running it on Windows 7 and 10 using Compatibility Mode (Windows XP) or by toggling compatibility settings on the CKwin.exe file. Current Status & Support CADkey Parametrics | Computer Graphics World

Windows NT or Windows 2000 (also compatible with Windows 95/98). CPU: 300MHz Pentium or higher. RAM: 128MB. Graphics: OpenGL-compatible video card. The Transition to KeyCreator

Prior to CADKEY 99, much of the software’s core logic was built upon the CADKEY Advanced Design Language (ADL). While powerful, ADL created a barrier to full system integration and required users to learn specific command structures distinct from the operating system.