A laptop, lap computer or notebook is a portable computer that can basically be used on your lap. Laptops are mainly used by people who work with their computers in different locations. In practice, laptops are often placed on a desk or table. A netbook is a lighter and often cheaper laptop. A laptop has most of the same components as a fixed computer, including a display, a keyboard, a pointing device such as a touchpad (also known as a trackpad) and / or a pointing stick and speakers in a single unit. A laptop is powered by electricity through an AC adapter and can be used away from an electrical outlet by the rechargeable battery.
A smartphone is a mobile device that combines cellular and mobile computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, which facilitate wider software, internet (including web browsing over mobile broadband), and multimedia functionality (including music, video, cameras, and gaming), alongside core phone functions such as voice calls and text messaging. Smartphones typically contain a number of metal–oxide–semiconductor (MOS) integrated circuit (IC) chips, include various sensors that can be leveraged by their software (such as a magnetometer, proximity sensors, barometer, gyroscope, or accelerometer), and support wireless communications protocols (such as Bluetooth, Wi-Fi, or satellite navigation).
A tablet computer or simply tablet is a mobile computer in which a touch screen, battery and computer hardware are combined into one flat, rectangular device. The touch screen, usually 7 to 12 inches (18 to 30 cm) in diagonal, is the primary interaction option for the user. Many tablets also have multiple sensors and options for wireless data connections. The idea of a tablet computer dates from the mid-twentieth century and was later popularized in science fiction. Although tablets have come onto the market sparsely since the late 1980s, the concept only experienced a broad breakthrough in 2010, when the American computer company Apple presented the iPad. In 2014.
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