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B B A I

Data and Information

The word information was derived from Latin. The verb from which it is derived is informare, which means ‘to instruct’. It also means giving form to an idea or fact.

Data is the plural of the Latin word datum. It can mean ‘to give’.

Data is raw material for data processing. data relates to fact, event and transactions. Data refers to unprocessed information.

Information is data that has been processed in such a way as to be meaningful to the person who receives it. it is any thing that is communicated

Information

Information is usually the processed outcome of data.

data in a meaningful form is information.

Information can be a mental stimulus, perception, representation, knowledge, or even an instruction. The examples of data can be facts, analysis, or statistics. In computer terms, symbols, characters, images, or numbers are data

Data refers to the lowest abstract or a raw input which when processed or arranged makes meaningful output.

It is the group or chunks which represent quantitative and qualitative attributes pertaining to variables

Data vs. Information

Data 6.34

6.45

6.39

6.62

6.57

6.64

6.71

6.82

7.12

7.06

SIRIUS SATELLITE RADIO INC.

$5.80

$6.00

$6.20

$6.40

$6.60

$6.80

$7.00

$7.20

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Last 10 Days

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Information

Data vs. Information

Data: 51007

Information:

5/10/07 The date of your final exam.

$51,007 The average starting salary of an accounting major.

51007 Zip code of Bronson Iowa.

Characteristics of Information

Availability/accessibility

Accuracy

Reliability or objectivity

Level of detail/conciseness

Presentation

Timing

Value of information

Cost of information

Characteristics of computers

speed, accuracy, diligence, versatility and storage capacity

Input Unit

Keyboard , mouse, floppy disk drive, magnetic tape, etc

Storage Unit:

Primary Storage

Secondary Storage: memory devices are Hard disk, CD, etc

MEMORY SIZE

All digital computers use the binary system, i.e. 0’s and 1’s.

Each character or a number is represented by an 8 bit code.

The set of 8 bits is called a byte.

A character occupies 1 byte space.

A numeric occupies 2 byte space.

Byte is the space occupied in the memory

Output Unit:

Printers, Visual Display Unit (VDU) are the commonly used output devices. Other commonly used output devices are floppy disk drive, hard disk drive, and magnetic tape drive

ALU

CU

CPU