Barometer:

A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather. Numerous measurements of air pressure are used within surface weather analysis to help find surface troughs, high pressure systems and frontal boundaries.

A laptop:

is a portable personal computer with a clamshell form factor, suitable for mobile use. Laptops are commonly used in a variety of settings, such as at work, in education, and for personal multimedia.

A laptop combines the components and inputs of a desktop computer, including the display, speakers, a keyboard, and pointing devices (such as a touchpad or track pad) into a single unit