Ellen Says: A laptop is a personal computer designed for mobile use and small and light enough to sit on a person's lap while in use.
Laptops are usually notebook-shaped with thicknesses between 0.7–1.5 inches (18–38 mm) and dimensions ranging from 10x8 inches (27x22cm, 13" display) to 15x11 inches (39x28cm, 17" display) and up. Modern laptops weigh 3 to 12 pounds (1.4 to 5.4 kg); older laptops were usually heavier. Most laptops are designed in the flip form factor to protect the screen and the keyboard when closed. Modern tablet laptops have a complex joint between the keyboard housing and the display, permitting the display panel to swivel and then lie flat on the keyboard housing.
Laptops were originally considered to be a small niche market and were thought suitable mostly for specialized field applications such as the military, accountants and sales representatives. But today, laptops are becoming more popular for student and general uses.
Manufacturers often refer to laptops as "notebooks"; this is to avoid warm thigh complaints from customers, and consequent opportunist liability suits.