The word that is different from the rest is D: Piano. Here is the detailed explanation:
Computer:
- A computer is an electronic device that can store, process, and retrieve data.
- It is used for various purposes such as browsing the internet, creating documents, playing games, and more.
- Computers have input and output devices like a keyboard, mouse, and monitor.
Typewriter:
- A typewriter is a mechanical device used for typing characters onto paper.
- It was widely used before the invention of computers and printers.
- Typewriters have a keyboard and a mechanism that strikes the paper to create printed text.
Calculator:
- A calculator is a device used for mathematical calculations.
- It can perform arithmetic operations such as addition, subtraction, multiplication, and division.
- Calculators can be either electronic handheld devices or software applications on computers.
Piano:
- A piano is a musical instrument that produces sound by striking strings with hammers.
- It is played by pressing keys on a keyboard, and the sound is amplified through a soundboard.
- Unlike the other options, a piano is not a device used for computation or typing.
Summary:
In summary, while a computer, typewriter, and calculator are all devices used for various purposes, a piano is a musical instrument and does not fit into the category of computational or typing devices.