Wi-Fi is a type of wireless local area network (WLAN), allowing computers to communicate with each other, share information and connect to the internet without the use of wires.  Wired-up computers can perform the same functions but lack the mobility of wireless laptops and may be more difficult to install in some circumstances.  On the other hand, wired systems may offer advantages over wireless such as speed, security, reliability, and as discussed on this website, health and safety.

For Wi-Fi frequencies and exposures see Wi-Fi exposures and guidelines.