A laptop is a computer for mobile use. A laptop has most of the same components as a desktop PC, including a display, a keyboard and a pointing device known as a touch pad. A laptop is powered by mains electricity via and AC adapter , and can be used away from an outlet using a rechargeable battery. Laptops are also known as notebook computer, notebooks or netbooks.

These are the advantages of a laptop:

Productivity: A laptop can be used places to places whereas a desktop PC has to stay in one place. For example if you were on a train and you was doing a presentation you could do it on a laptop not on a desktop PC.

Quiet: A laptop is often quieter then a desktop.

Connectivity: A laptop has loads of Wi-Fi wireless networks and cellular broadband data services. meaning that a laptop can have easy Internet and local network connectivity.

Size: A laptop is smaller that a desktop PC. This is really beneficial when space is premium for example in a small apartment.

Battery: A charged laptop can continue to be used in case of a power cuts.

These are the disadvantages of a laptop:

Wrists: A laptop has a small touch pad, because of that people can have a strain injury.

Battery Life: The battery life on a laptop is limited because the capcity drops with time, eventually requiring replacement after as little as a ear. And replacement batteries can laso be expensive.

Equipment wear: Because if the laptops portability, laptops are subjected t o more wear and physical damage than desktops.

Neck spinal: The integrated screen often required to lean over for a better view, which can cause neck and/or spinal injuries.

Thighs: Heat generated from using a laptop on the lap can also cause discoloration on the thighs known as skin syndrome.

Desktop PC:

A desktop computer is a personal computer (PC) in a form intended for regular use at a single location, as opposed to a laptop or a portable computer. Early desktop computers are designed to lay flat on the desk, while the modern one stands upright. Most modern desktops have separate screens and keyboards. A desktop was considered a computer that could fit on a desk.

These are the advantages of a desktop PC:

Battery: It won’t run out of battery whereas a laptop will.

Features and power: A desktop computer has more power and more features.

Theft: A desktop has a low risk of being stolen, because it is big and heavy.

Easier: A desktop are easier to use than a laptop and it is not that expensive to upgrade.

Connectivity: A desktop has a better connectivity because it has wire connect to the computer.

These are the disadvantages of a desktop PC:

Space: A desktop takes up more space than a laptop.

Movement: A desktop is difficult to move if you need to repair it, and to heavy to move it around the house.

Monitors: A desktop PC are normally cheaper than laptops, but they require the user to have a monitor, since there is no screen built into the computer like a laptop.

Power use: A desktop PC contain a large power supply form the wall socket to run the hardware.

Location: A desktop PC is large and and designed to be set up in a location, making it impractical to move them around frequently.

Tablet:

A tablet is a mobile computer but larger than a mobile or a personal digital assistant, integrated into a flat touch screen rather than a physical keyboard, it often uses an onscreen keyboard. It also uses a passive stylus pen, or a digital pen.

These are the advantages of a tablet:

Weight: The tablet has a lighter weight, lower power models can function similarly to dedicated E-book reader like the amazon Kindle.

Battery: The tablet has a longer battery life then a laptop or a netbook.

Keyboard: The tablet has a virtual keyboard that it lit, then it is more suitable in dark places.

Easier: The tablet has the ability for easier or faster entry of diagrams, mathematical notations and symbols.

Pen: The Tablet has users that find it more direct and pleasant to use a stylus, pen or finger and tap on objects.

These are the disadvantages of a tablet:

Higher screen risk: The tablet computers are handled more than conventional laptops.

Dropping: The tablet has a risk of dropping it.

Internet: The tablet has the slow internet speed.

Hinge risk: The tablet’s screen hinge is often more complex and delicate.

Less user-friendly ergonomics: The tablet does not provide room for a wrist rest, and the user’s arm must move constantly while writing.