module 2.1
Post on 04-Jan-2016
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BASIC CONCEPTS OF COMPUTING
What is a computer? An expanded model of a
computer The role of software Types of computers ICT systems Glossary
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Main components or parts of a computer
IPO model
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The basic model of a computer
A computer is a multi‑purpose electronic tool that can receive data (input),can process the data, can produce results and can output them.
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A definition of a computer
DATA INFORMATION raw, unprocessed facts.
CAT123NW
is the result of the processing of data and should be useful and meaningful.
registration number of a car from the North West province.
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CAT123NW
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get data into computer
executes the instructions,
processes the data and manages and
controls all the other parts of the computer
keep instructions and data that it is not
currently working on
get feedback from the computer
allow computers to communicate with
each other
Programs have to be ‘loaded’ before they can be used.
Data must also be in memory if the computer is to work with it.
The contents of memory only become ‘permanent’ when you ‘Save’ them.
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Note the following:
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Software categories according to function
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Software categories according to distribution model
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Size and processing power
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Servers
-used in network environments to help ‘run’ a network of linked computers
These are small portable devices
They are designed to be controlled through touch screen interfaces
Consumer tablets usually have WiFi, Bluetooth and 3G communication built in 18
Consumer Tablets & Tablet PCs
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Uses
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Advantages and disadvantages of using computers
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The ability to analyse and interpret data in order to arrive at valid conclusions and to form accurate predictions (information) can spell the difference between success and failure.
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Information Communication Technology
Manipulated or processed
data
The process of transferring
data/information
from one place to another
• Systems technologies (hardware and software)
• Communications technologies (networks and communication devices)
Data warehousing: securely store, manage and retrieve large
amounts of data. Data mining:
process and analyse data looking for valuable information that you did not even know was there.
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Data storage by businesses
Supermarket chain Modern POS systems
use barcodes and scanning
Scanning is also more accurate
Items scanned removed from a computerised database of what is in stock – enabling you to better manage your inventory.
Data sent to the head office - stock ordering and management decisions. 25
Examples of ICT systems in everyday life
An ICT system enables them to Order only the right
amount of stock when needed
See which items are not selling well
track sales
Cellphone company contracts adequate supplies & stock
of cellphones generating finance for
expansion and maintenance tracking of call durations,
SMSs, data transfers, free talk time, carry-over of free minutes/seconds, and expiry of the same
service and repairs of cellphones and other infrastructure
monitoring the network status
maintaining staff records 26
Examples of ICT systems in everyday life
An ICT system enables them to
List how many calls you have made, to which numbers and how long each call was
Total the number of minutes used and bill you for them
Total the amount of data you have transferred (usually in megabytes) and then bill you for that.
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