In the context of Windows Mobile, an "ISO" typically refers to one of three things:
An updated browser with desktop-fidelity rendering, Flash Lite support, and a zoom bar. Windows Mobile 6.5 Iso
Windows Mobile 6.5, released to manufacturers on , was the final major iteration of Microsoft’s classic mobile platform before the transition to Windows Phone 7. Often sought today by developers, retro-tech enthusiasts, and enterprise specialists, a Windows Mobile 6.5 ISO (or emulator image) provides a glimpse into the "bridge" era of mobile computing where Microsoft attempted to blend stylus-driven heritage with modern, finger-friendly interfaces. What is a Windows Mobile 6.5 ISO? In the context of Windows Mobile, an "ISO"
Windows Mobile 6.5 ISO: A Legacy Overview and Technical Guide What is a Windows Mobile 6
A free cloud-based backup service for contacts, photos, and messages. Windows Mobile 6.5 1st Look (reposted) | by Chris Leckness
Microsoft's first dedicated app store, which allowed users to browse and install apps directly from their device.
Disk images or .msi installers containing the necessary headers, libraries, and tools for building software.