ClarisWorks / AppleWorks Presentation (.cwk)
The CWK (ClarisWorks) file extension was used specifically for ClarisWorks and later AppleWorks Presentation documents. Developed by Claris, a subsidiary of Apple, ClarisWorks was later renamed AppleWorks. AppleWork's Presentation component enabled users to create slide-based presentations. Although AppleWorks was discontinued in 2004 and this format was replaced by KEY, These CWK Presentation files can still be opened using older versions of Apple's Keynote, ensuring the continuation of legacy data access.