Unit 1 (Computing Systems), Chapter 2: What is a Computer?

What is the difference between CPU and the GPU?

A CPU is the main brain of a computer and runs most of the programs, while the GPU mainly processes display information for your screen.

What is a computer?

A computer is a device that stores and processes information.

How are storage and processing hardware parts different? Are they both necessary for a computer to work?

A processing unit like a CPU run programs, and a storage unit like RAM stores information. Both parts are necessary in a computer because a computer is a device that can store and manipulate data (which requires a processor).

What kinds of tools existed before programmable computers were invented?

Before programmable computers were invented, there were several tools that humans used to help solve math equations, like the abacus and the slide rule.

How have computers changed over time?

Computers have become smaller and much, much more powerful over time.

What is the difference between hardware and software?

Hardware is the physical parts of a computer, and software is the code or programs that the computers run.

What kind of hardware is each of these parts? Choose from input, output, processing, or storage. A. TV screen: ___________ B. CPU: ___________ C. Keyboard: ___________ D. Headphones: ___________ E. USB flash drive: ___________

Hardware: A. Output B. Processing C. Input D. Output E. Storage

Why was the Apple II significant?

It was the first mass-produced personal computer.

How is a new smartphone similar to the first computers ever made? How is it different?

Just like the first computers, smartphones use both software and hardware to run. They also both have input, output, storage, and processing parts. But smartphones are much more powerful and many times smaller than the first computers.

What is the difference between system software and application software?

System software makes sure the individual hardware devices properly work together and with other programs. Application software are programs that allow the user to perform specific tasks.