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16 Cards in this Set
- Front
- Back
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Program |
A program is a set of instructions in the computers memory to perform a certain task. |
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Software |
Software is essential to a computer because without software, a computer can do nothing. |
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Programmer |
Is a person with the training and skills necessary to design, create, and test computer programs. |
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Hardware |
Refers to the physical components that a computer is made of. A computer is a system devices. |
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Central processing unit |
The CPU runs the program and is the most important component in a computer, without it the computer can not run the software. |
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Control unit |
Coordinates all the computer's operations, responsible for determining where to get the next instruction and regulating the other major components of the computer with control signals. |
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Arithmetic and logic unit |
Hardware optimized for high speed numeric calculation; hardware designed for true/false, yes or no decisions. |
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Fetch |
The CPU's control unit fetches, from main memory, the next instructions in the sequence of program instructions |
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Decode |
The instructions is encoded in the form of a number. The control unit decodes the instructions and generates an electronic signal. |
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Excute |
The signal routed to the appropriate component of the computer. The signal causes the component to perform an operation. |
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Main memory / Ram |
Random access memory, CPU is able to quickly access data stored at any random locations in RAM. RAM is a volatile type memory that is used for only temporary storage while a program is running. When the computer is turned off the data is erased. RAM is stored in small chips. |
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Secondary storage |
Non-volatile: data retained when program is not running or computer is turned off. Magnetic: floppy disk, hard drive; optical: CD- ROM, dvd. Flash drives. |
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Input devices |
The device that collects the information and sends it to the computer such as a keyboard, mouse, scanner, digital camera, microphone, disk drives, CD drives, and dvd drives. |
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Output devices |
Any information the computer send to the outside world. |
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Computer |
Programmable machine designed to follow instructions |
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Main hardware of the computer |
CPU, main memory, secondary memory/storage, input devices, output devices |
