Question | Answer |
Computer System | The computer and other support devices that work as a team to receive information as the user inputs it, process that information per the directions that the user defines, and output the information in a usable format. |
CPU | Processing the information takes place in the central processing unit. |
The Control Unit | What retrieves the instructions and sends command signals to the rest of the computer system to tell them what to do? |
ALU | The arithmetic logic unit performs the mathematical calculations that are required in many data processing programs. |
Memory Unit | Stores information and is internal to the computer as well as divided into two types of memory: RAM and ROM |
RAM | Random access memory is temporary memory that is designed to hold new data and is available only while the computer is turned on. |
ROM | Read-only memory is permanent internal memory inside the system that is inaccessible by the user and is used to store the instructions that are installed or programmed at the manufacturer. |
bit | The smallest unit of binary information (a zero or one). |
byte | Eight bits make a byte, which can represent one alphabetic (A,B,C) or one numeric (1,2,3) character of information. |
kilobytes, megabytes, and gigabytes | measurement of computer memory |
Megahertz/Gigahertz | Megahertz, which equals one million cycles per second or gigahertz, which equals one billion cycles per second. |
cache | Provides a temporary storage area that provides a quick access to information. |
Input devices | keyboards, mice, scanners, graphic tablets, microphones, digital cameras, web cameras, electronic whiteboards, PDAs, "clickers", and cell phones all allow the input of data into the computer. |
peripheral devices | To input the information, output the information into a form that is easily read by the user, or store the information for later use. |
Resolution | the clarity of the image that is seen on the computer screen. |