COMPUTER

Cycles.

1. Input - Entering of data into the computer memory. 2. Processing - Performing operation on the data. 3. Output - Presenting the results. 4. Storage - Saving information or programs for future use. Note: No communication is here.

Examples of Storage Devices or Media.

1. Tape. 2. Microfiche 3. Zip disk. 4. Hard disk. 5. CD- Rom. 5. DVD Note: The floppy disk drive, CD-Rom drive, other drives and readers allow the computer to store informations on the storage media.

Input devices.

Are any computer hardware components that allow the computer users to enter data or instructions into the computer memory for processing.

Output devices.

Are devices that convert the processed data from binary form to the user's language.

Meaning of CRASS.

C- Communication; consistency. R- Reliability. A- Accuracy. S- Speed. S- Storage.

Other definition of Computer.

Computer is an electromechanical device capable of receiving/accepting data, processing data, producing results or output and facilitates effective communication.

Definition of Computer according to Cashman and Vermaat.

Computer is an electronic device operating under the control of instruction stored in its memory that receives data, manipulates data according to specified rules, produce results and store the result for future use.

Accuracy.

Computers can process large amount of data and still generate error-free results provided data is input correctly and that instructions work properly.

Storage.

Computers store enormous amount of data and make it available for processing any time needed.

Communication; consistency.

Conputers can be connected to eachother through network devices and softwares to communicate among eachother and share resources and informations effectively.

Computer hardware.

Criteria to look at. 1. The machinery part of the computer system is referred to hardware. 2. Hardware is the mechanical, magnetic, electronic and electrical components of a computer system. 3. The physical components of the computer system which can be seen and touched/felt. In conclusion. It's the collection of the mechanical, magnetic, electronic, electrical and physical elements that make up the tangible part of the computer system.

Inputs

Data and Instructions.

Speed.

Data, information and instruction flow in a circuit and they travel at an incredibly fast speed. Most computers carry out billions of operations in a second.

Processing Operations.

It deals with the manipulation of data or instruction received from the user through the input devices.

Definition of Data.

It is a collection of unprocessed texts, number of graphics, audios and videos.

Information Processing Cycle.

It is the sequence through which the computer accepts data from the user, Changes it to information and sends it back to the user for storage or further processing.

Input Operations.

It occurs when the user or outside world send instruction to computer which it receives as data.

Integration Literacy.

It's the ability to incorporate knowledge and skills in Computer literacy and information literacy to solve problems.

Definition of Instructions.

Its any form of program commands and user responses that the processing unit receives from the user.

Output Operation.

Its the process where the processed data or information (output) is made available to the user in a meaningful languages. They can be perceived through the output devices.

What Data is converted into.

Machine readable language which is binary form (0 - 1) or electrical signals which corresponds to "on" and "Off".

Information Literacy.

Refers to the ability to know when information is needed, to be able to identify, locate, evaluate and effectively use the information for the issue at hand.

Storage Operations.

This deals with the saving or storing of information on a suitable storage media for future use or further processing.

Communication Operations.

This happens when communication devices are used to connect computers so they share data and information.

considerations to why Computer is a powerful tool.

Whose theory? Cashman and Vermat Which year? 2003. Reason: Computer performs the information processing cycle operation with amazing speed, reliability, consistency, and accuracy (CRASS).

computer literacy

Refers to the knowledge and ability to use computer and related technologies efficiently and comfortably.

Differences between data and Information.

• Data is a collection of unprocessed data, texts, numbers, images, audio and video which the user send to the computers memory for processing. • Information is a processed data or that has been organised into meaningful and useful form by computers processing unit and is made available to the user.

Basic Operations of a Computer.

• Input operations. • Processing operation. • Output operations. • Storage operations. • Communication Operations.

What a computer does/ Functions.

• It accepts data . • It processes data. • It gives out information. • It stores information. • It facilitates effective communication.

Major devices responsible for processing.

• Processors. • Memory. Note: Data stored in the memory are in binary which the user does not understand which necessitates its conversion into meaningful information.