2. Fast
Accurate (when given correct data)
Store masses of information in
small space
Work 24hrs a day
Design and Test e.g. aircraft and
cars saving money
Why use Computers?
3. Replaced people in certain types of
employment
Not always secure, confidential
information can be misused
Computers can break!
Staff need to be trained to use
them
Any disadvantages?
4. There are four basic parts of a
computer system:
HARDWARE
BACKUP STORAGE
SOFTWARE
OPERATING SYSTEM
Basic parts of a computer
5. Hardware can be classified according to what it does for
the computer system.
There are 4 main types of Hardware.
Input devices (input peripherals)
Output devices (output peripherals)
Processing components
Backing stores
Hardware
6. Input devices (input peripherals)
Input Devices are used by the computer
system to gather data into the computer
system.
7. Output devices (output peripherals)
Output devices are used by the computer
system to send data out of the computer
system.
10. The parts of the
computer that store
information when the
computer is turned off
BACKUP STORAGE
(Also called Backing Storage)
11. Name Size Description
Floppy disk 1.4 Mb Small portable magnetic
disk
Zip disk 250 Mb Small portable magnetic
disk
CD-ROM 650 Mb Optical disk.
CD-R and
CD-RW can be written on.
Jaz drive 2000 Mb A larger and faster version
of a Zip disk
DVD 4700 Mb Digital Versatile disk.
Similar to CD-Roms but
stores 7 times more data.
Hard Drive 10 000 Mb The C drive on computers.
A magnetic store.
Tape Streamer Used to back up hard
drives.
12. Application software Uses Examples
Word processor (WP)
Production of text.
Editing of text.
Printing text.
Microsoft Word
Creative Writer
Desk top publisher (DTP)
Importing pictures and text.
Organising pictures and text.
MS Publisher
Spreadsheet
Storing data
Performing calculations
Drawing graphs
MS Excel
Lotus 123
Database
Storing data
Searching
Sorting
MS Access
Key Plus
Computer control
Sensing
Making decision
Output of control signals
Data logging
Sensing
Storing data
Art package
Drawing pictures
Editing pictures.
Paintbrush
Corel Draw
13. OS have four main functions:
To allow the application software to communicate
with the hardware correctly
To manage the transfer of data to and from the
peripherals
To manage the computer system
To manage system security
OPERATING SYSTEM
14. MS-DOS - now out of date, but still used on
most computers
Windows 98 - used on single computers
Windows NT - like windows 98, but is used on
computer networks
Examples of OS
15. The central processing unit
of the computer is part of the
hardware of a computer
system. The CPU does the
actual processing of the data.
CENTRAL PROCESSING UNIT
16. 1. Explain how the buttons and icons in Word make it easy to use?
2. What is the difference between OS and application software?
3. Why does the school network back up the H drive onto a Tape
Streamer every night?
4. Which part of the computer manages the peripherals?
5. Give three examples of input peripherals.
6. Give three examples of output peripherals.
7. Give one advantage of using a DVD instead of a CD-ROM.
8. Why should floppy disks not be left near magnets?
9. What is the difference between RAM and ROM?
Review and Research
Editor's Notes
Explain how the buttons and icons in Word make it easy to use? Easier not long winded, memory aid, quickWhat is the difference between OS and application software? In easier language, your car have some controls like steering, accelerator, break etc. To drive a car you have to know about only these controls. But the car is not directly controlled by breaks, accelerator and steering. These all controls are connected with engine and other machines. And these machines controls the car. Working of these machines are not known by all the persons who drive the car. It is known by mechanics. We can say that steering, break, accelerator are Application and engine and machines are the systems. Similarly, the Application Software is a software that APPLIES to the real life application. For example: Microsoft Word is used to create documents similar to you create manually on paper. Accounting Software those are used for accounting which is similarly done manually on Account Book. Thus, Application Software are easier to be understood by normal users because they directly deals with the normal real life applications. But the System Software are the software which deals with the system or hardware. For example: Disk Management Tools which are used to partition or format the disk. System Software are recommended to be used only by Advanced users who are having advance knowledge of the computer system. https://uk.answers.yahoo.com/question/index?qid=20060905073557AAIOHbA Why does the network back up the H drive onto a Tape Streamer every night? Sometimes referred to as a streamer, the tape backup is a form of data storage that is used to create a copy of the data stored in a system at a specific point in time. The data are copied onto a reel of magnetic tape, and can be permanently archived for future reference.What is responsible for managing the computer peripherals? Operating SystemGive three examples of input peripherals. Keyboard, Mouse and MicrophoneGive three examples of output peripherals. Printer, Monitor and SpeakersGive one advantage of using a DVD instead of a CD-ROM. Larger storage space, faster, more flexible watch DVDsWhy should floppy disks not be left near magnets? It stores information and stores it on special magnetised material, so by putting it near a magnet it can change or lose dataWhat is the difference between RAM and ROM? Read Only Memory instructions how to load up, Random Access Memory is working memory (Extra desk)
