- WDT : A watchdog timer (sometimes called a computer operating properly or COP timer, or simply a watchdog) is an electronic timer that is used to detect and recover from computer malfunctions.
- WE : Write Enable - control signal
- Webcam : A webcam is a video camera that feeds its images in real time to a computer or computer network, often via USB, Ethernet, or WI-Fi.
- WebGL : WebGL
- WiFi : Wi-Fi
- WLAN : Wireless LAN
- WP : Write Protect - control signal
- W^X : W^X "Write XOR Execute"