The HP EliteBook 840 G3 is a laptop designed for business use. It has a slim design and is constructed with a durable aluminum casing. It comes with a 14-inch HD or Full HD display and is powered by a 6th or 7th generation Intel Core i5 or i7 processor, with options for up to 8 GB of RAM and 256 GB of storage. It has a built-in fingerprint reader for security and a backlit keyboard for easier typing in low light environments. The laptop also comes with a range of ports, including USB 3.0, HDMI, and VGA, and has a long battery life. It is designed to be lightweight and portable, making it an ideal choice for business professionals who need a reliable and powerful machine for work on the go.