WLAN stands for Wireless Local Area Network, which is a type of network that allows devices to connect and communicate wirelessly within a limited geographical area like an office, building, or home. WLANs use radio waves to transmit data and are commonly associated with Wi-Fi.

An attachment is a file that can be included with an email message. This feature allows users to send documents, images, videos, or other files along with their email.

BMP stands for Bitmap Image File and is a standard file extension for graphics or image files. It stores digital images in a bitmap format, which is widely used for storing raster graphics.

A scanner is a light-sensitive device that captures drawings, printed text, or other images and converts them into a digital form. It creates a digital representation of a physical document, which can then be stored, edited, or shared on a computer.