S
WAmigaOS
WAmigaBASICA
WHaage & Partner
WILBMB
WInstaller (programming language)
WIntuition (Amiga)C
WMagic User Interface
WMagicWBD
WOriginal Chip Set
WPowerUP (accelerator)E
WProfessional File System
WScalosF
WWorkbench (AmigaOS)
WXAD (software)