General

1
Organizing Your Work
2
Session Objectives

• Explaining Input and Output Devices

• Describing Memory

- Discussing types of memory

• Describing Storage devices

- Discussing types of storage devices
- Functionality of storage devices

• Discuss File Management

3
A Computer
Monitor Display/Screen
CD Drive
Printer
Speaker
Floppy Drive
Console Unit
Joystick
Mouse
Keyboard
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Input Devices
Devices that are used to give instructions to
the computer are known as Input Devices.
Some common input devices are
5
Output Devices
Devices that are used to view information or
processed data are known as Output Devices.
Some common output devices are

• Primary Output
• Device

• Uses
• Cathode Ray Tube
• technology as in
• televisions

• VGA or
• SVGA monitor

6
Output Devices
Devices that are used to view information or
processed data are known as Output Devices.
Some common output devices are

• Thinner and
• Lighter monitors

• Require less power
• than CRT monitors

7
Output Devices
Devices that are used to view information or
processed data are known as Output Devices.
Some common output devices are

• Another most commonly used output device.

• Basically of 2 types - Impact - Non
  Impact

8
Output Devices
Devices that are used to view information or
processed data are known as Output Devices.
Some common output devices are

• Used for programs
• that support sound.

• Speakers are attached to a sound card.

9
Memory
Memory is a measure of an individuals capacity
to remember.
Memory is basically of two types
Primary Memory Primary memory is used
for storing data and
instructions
temporarily.
Secondary Memory Secondary memory
comprises of storage
devices such as
hard disks and floppy disks that act as a
permanent storage medium.
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Primary Memory
Primary memory is of two types
Random Access Memory This is a computers
primary storage area, used to store and retrieve
information that is passed to the CPU for
processing.
RAM
The type of RAM affects performance, as the
information stored here has to be refreshed
quite a few times per second by the processor.
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Primary Memory
Primary memory is of two types
Read Only Memory It is an integrated circuit
chip containing programs and data that can be
accessed and read but cannot be modified.
ROM
Non Volatile random access storage is the read
only memory (ROM).
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Storage Devices Secondary Memory

• Hard disks are the main storage media of a
  computer.

• The hard disk is placed inside the CPU and is
  referred to as a fixed storage medium.

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Storage Devices Secondary Memory

• Floppy disks are removable storage media.

• A floppy consists of thin plastic disk that is
  coated with a magnetic substance.

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Storage Devices Secondary Memory

• CD ROM stands for Compact Disc Read Only
  Memory

15
Memory Measurement

• Computer memory can be measured in bits and
  bytes.

8 bits - 1 byte
1024 bytes - 1 Kilobyte
1024 Kilobytes - 1 Megabyte
1024 Megabytes - 1 Gigabyte
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File Management