- WAV — is the Windows standard for waveform sound files.
- Wavelet — A mathematical function used in compressing images. Images compressed using wavelets are smaller than JPEG images and can be transferred and downloaded at quicker speeds. Wavelet technology can compress color images from 20:1 to 300:1, grayscale images from 10:1 to 50:1.
- Windows CE — Windows CE (sometimes abbreviated WinCE) is a variation of Microsoft's Windows operating system for minimalistic computers and embedded systems. Windows CE is a distinctly different kernel, rather than a "trimmed down" version of desktop Windows. It is supported on Intel x86 and lookalikes, MIPS, ARM, and Hitachi SuperH processors.
- Windows Mobile 5.0 — Windows Mobile 5.0, originally codenamed "Magneto", was released on May 9, 2005. It is powered by Windows CE 5.0 and uses the .NET Compact Framework 1.0 SP2 - an environment for programs based on .NET to be used.