The following information has been taken out of IBM's Warp 3 Toolkit documentation. The XFolder class has been omitted here. OS/2 Warp 4 adds a few more classes, which are in part shown here; depending on other WPS-aware software installed on your system, even more classes might be available for certain document types.

Classes that make sense to create objects with using the provided NEWOBJ.CMD are highlighted. Be careful with other classes, results may be unpredictable.

           WPObject
             ÃÄÄ WPAbstract
             ³     ÃÄÄ WPClock
             ³     ÃÄÄ WPCountry
             ³     ÃÄÄ WPDisk
             ³     ÃÄÄ WPKeyboard
             ³     ÃÄÄ WPLaunchPad
             ³     ÃÄÄ WPMouse
             ³     ÃÄÄ WPPalette
             ³     ³     ÃÄÄ WPColorPalette
             ³     ³     ÃÄÄ WPFontPalette
             ³     ³     ÀÄÄ WPSchemePalette
             ³     ÃÄÄ WPPower
             ³     ÃÄÄ WPPrinter
             ³     ³      ÀÄÄ WPRPrinter
             ³     ÃÄÄ WPProgram
             ³     ÃÄÄ WPShadow
             ³     ³      ÀÄÄ WPNetLink
             ³     ÃÄÄ WPShredder
             ³     ÃÄÄ WPSound
             ³     ÃÄÄ WPSpecialNeeds
             ³     ÃÄÄ WPSpool
             ³     ÃÄÄ WPSystem
             ³     ÀÄÄ WPWinConfig
             ÃÄÄ WPFileSystem
             ³     ÃÄÄ WPDataFile
             ³     ³      ÃÄÄ WPBitmap             3)
             ³     ³      ÃÄÄ WPHtml               2)
             ³     ³      ÃÄÄ WPIcon
             ³     ³      ÃÄÄ WPMet
             ³     ³      ÃÄÄ WPPif
             ³     ³      ÃÄÄ WPPointer
             ³     ³      ÃÄÄ WPProgramFile
             ³     ³      ³      ÀÄÄ WPCommandFile
             ³     ³      ÃÄÄ WPUrl                2)
             ³     ³      ÀÄÄ WebExplorer_Url      1)
             ³     ÀÄÄ WPFolder
             ³            ÃÄÄ WPDesktop
             ³            ÃÄÄ WPDrives
             ³            ÃÄÄ WPHost               2)
             ³            ÃÄÄ WPHvManager          2)
             ³            ÃÄÄ WPMinWinViewer
             ³            ÃÄÄ WPNetgrp
             ³            ÃÄÄ WPNetwork
             ³            ÃÄÄ WPRootFolder
             ³            ÃÄÄ WPServer
             ³            ÃÄÄ WPSharedDir
             ³            ÃÄÄ WPStartup
             ³            ÃÄÄ WPUrlFolder          2)
             ³            ÀÄÄ WPTemplates
             ÀÄÄ WPTransient
                   ÃÄÄ WPDevice                    2)
                   ³     ÃÄÄ WPDevAudio            2)
                   ³     ÃÄÄ WPDevBus              2)
                   ³     ÃÄÄ WPDevCDRom            2)
                   ³     ÃÄÄ WPDevCPU              2)
                   ³     ÃÄÄ WPDevDiskette         2)
                   ³     ÃÄÄ WPDevDisplay          2)
                   ³     ÃÄÄ WPDevHarddrive        2)
                   ³     ÃÄÄ WPDevKeyboard         2)
                   ³     ÃÄÄ WPDevMemory           2)
                   ³     ÃÄÄ WPDevMouse            2)
                   ³     ÃÄÄ WPDevParallel         2)
                   ³     ÃÄÄ WPDevPeriph           2)
                   ³     ÃÄÄ WPDevSerial           2)
                   ³     ÃÄÄ WPDevTape             2)
                   ³     ÀÄÄ WPDevTimer            2)
                   ÃÄÄ WPJob
                   ÃÄÄ WPPdr
                   ÃÄÄ WPPort
                   ÀÄÄ WPQdr

Notices:

1) This is not a standard WPS class and might not be present on every Warp 3 system.

2) This class is available only on OS/2 Warp 4.

3) In Warp 4, WPBitmap is a subclass of WPImageFile, which is in turn a subclass of WPDataFile.