LAN (Local Area Network): A network system with communication lines that connects computers, printers, and other devices in a limited area such as in a building, so they can interact with each other.

Leave: The act of taking a leave of absence from work with a pre-specified reason/permission or the period of leave itself.

Leave Management: The act of managing personnel absence due to vacations, business trips, external duties, etc.

Live Face Detection(LFD): A technology that detects forged faces, e.g., masks and photographs.

Live Finger Detection(LFD): A technology that detects Fake fingerprint copied using rubber, silicone, clay, glue, film, and so on.

Lock: An electro-mechanical device that connects to the access control system to be used for locking the door. It refers to all electronic devices either built into or fitted to the door.

Log: The records of all events occurred in the system, network, device, door, etc.

LSB (Least Significant Bit): The bit at the lowest position of binary data (the right-most bit) or its content. It is the opposite of the Most Significant Bit (MSB).