Chap1 it210 introduction to computer hardware (chapter one)
Introduction to Computer
Hardware (Chapter One)
PREPARED BY: KRISANDRA N. GAYLON
What is Computer?
- Is an electronic device that is designed to work with information.
- And also it can store, retrieve and process data.
What is system? (in general)
- It is a combination of components working together.
What is computer system?
- It a group of elements performing together to process data.
Computer System Unit
Central Processing Unit
Three component of a Computer
1. Hardware – it is refers to the physical component of the
2. Software – is a computer program. (Intangible)
3. Peopleware – is the one who uses the computer. (User)
Types of Personal Computer
• Tower Model
• Desktop Model
• Notebook Computer
• Laptop Computer
• Hand-held computer
• The term refers to a computer
in which the power supply,
motherboard, and mass
storage devices are stacked on
top of each other in a cabinet
Desktop Model Computer
• A computer designed to fit
comfortably on top of a desk,
typically with the monitor sitting
on top of the computer.
• An extremely
weigh less than 6 pounds
and are small enough to
fit easily in a briefcase.
• A small, portable computer -
- small enough that it can sit
on your lap.
• A portable computer that is
small enough to be held in one’s
• Hand-held computers are also
called PDAs, palmtops and
• A small computer that literally fits in
your palm. Compared to full-size
computers, palmtops are severely
limited, but they are practical for
certain functions such as phone
books and calendars.
• Because of their small size, most
palmtop computers do not include
disk drives. However, many contain
PCMCIA slots in which you can insert
disk drives, modems, memory, and
PDA (Personal Digital Assistant)
• Short for personal digital
assistant, a handheld device
that combines computing,
• A typical PDA can function as a
cellular phone, fax sender, and
personal organizer. Unlike
portable computers, most
PDAs are pen-based, using a
stylus rather than a keyboard
for input. This means that
they also incorporate
Overview of Computer Operation
Control Device Interprets programs and sends instruction to
Performs calculation according to instructions
within programs. It referred to as CPU.
Storage Device Stores programs and data. Divided to “main
memory” and “auxiliary storage device”.
Input Device Inputs data to the main memory.
Output Device Output data from the main memory (display,
• Keyboard – is a human interface device which is represented as a
layout of buttons.
• Pointing device – is any human interface device that allows a user
to input spatial data to a computer. In that case of mice/mouse
and touch pads.
• Imaging and Video&Audio Devices – are used to digitize images or
video from the outside world into the computer. The information
can be stored in a multitude of formats depending on the user’s
o Image Scanner
o Fingerprint scanner
o Barcode reader
o 3D scanner
o Laser rangefinder
• Monitor – a visual display unit, often called simply a monitor or display, is a
piece of electrical equipment which displays images generated from the
video output of devices such as computer.
• Printer – is a peripheral which produces a hard copy (permanent human
readable text or graphics) of document stored in electronic form.
• LCD Projector – is a type of video projector for displaying video images or
computer data on screen or other flat surface.
• Speakers – are external sounds output, equipped with a low power internal
Classification of Hardware
1. Peripheral Devices – is an external device attached to the central
portion of the computer. Ex. Keyboard, monitors etc.
2. Central Processing unit – is that part of a computer that
performs calculations controls the other parts of the computer.
This include a master microprocessor chips and a portion of the
motherboard system logic.
3. Mass Storage System – is where you put the data you need
immediately at hand but which would not fit into memory.