A computer is a digital electronic machine that can be programmed to carry out sequences of arithmetic or logical operations (computation) automatically.
A laptop, laptop computer, or notebook computer is a small, portable personal computer (PC) with a screen and alphanumeric keyboard and Touch Pad.
A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry.
A projector comes in many different types. A few of these types include an HD projector, mini projector, LCD projector, and LED projector. An LCD, An DLP, and more projector