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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
Sto
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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
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CPU