Waterproof: A type of processing performed to prevent liquids due to rain, submersion, etc. from permeating the device and thereby affecting its functionality.

Weatherproof: A degree of waterproof performance somewhat lower than Waterproof.

Wiegand: A method that transfers a small amount of data using D0 and D1. Generally it is used as a method of communication between the reader and controller of an access control device.

Wireless LAN: A local area network that uses Radio Frequency (RF) technology. With a terminal fitted with a WLAN card, people can use a communication network within a certain distance from the place where an access point (AP) is installed.