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JBAG 2011
COMPUTER CONCEPTS
An Introduction to Computer Technology
Prepared by: Joel Bryan A. Guevarra
JBAG 2011 JBAG 2011
WHAT IS A COMPUTER?
JBAG 2011
JBAG 2011
What is a computer?
• Etymology
– Latin: computus and computare
– compute = to determine by
mathematical means
JBAG 2011
What is a computer?
• A machine that can be
programmed to accept
data, process it into useful
information, and store it
away
JBAG 2011
JBAG 2011
What is a computer?
• A machine designed for
manipulating data
according to a list of
instructions known as a
program
JBAG 2011
JBAG 2011
KEY CONCEPTS
• Computer: A machine that can receive and store information and change or process it
• Information: Knowledge that conveys meaning and is useful
JBAG 2011
KEY CONCEPTS
• Data (pl.): a collection of unprocessed items (e.g. text, numbers, images, audio, video)
• Note: the term ‘raw data’ refers to unprocessed information
JBAG 2011
KEY CONCEPTS
• People who use computers directly or uses the information are called: – computer users – end users – or simply users
JBAG 2011 JBAG 2011
COMPUTER LITERACY
Why learn about computers?
JBAG 2011
COMPUTER LITERACY • Awareness
– Becoming aware of the importance, versatility, and pervasiveness of computers in our society
• Knowledge – Learning what computers are
and how they work – Learning some technical jargon
• Interaction – Knowing how to use computers
for some simple applications
JBAG 2011 JBAG 2011
ADVANTAGES & DISADVANTAGES OF USING COMPUTERS
Pros and Cons
JBAG 2011
ADVANTAGES
• Speed
• Reliability (low failure rate)
• Consistency
• Huge Storage Capacity
• Ability to communicate with other
computers
JBAG 2011
DISADVANTAGES
Violation of privacy
Impact on labor force
Health risks Impact on environment
JBAG 2011
Correct Posture
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Correct Typing
JBAG 2011 JBAG 2011
WHAT IS A SYSTEM?
JBAG 2011
What is a System?
• a regularly interacting or
interdependent group of
elements forming a unified
whole
• a collection of related parts
treated as a unit where its
components interact
JBAG 2011
JBAG 2011 JBAG 2011
WHAT ARE THE COMPONENTS OF A COMPUTER SYSTEM?
Computer System
JBAG 2011
Computer Components
Computers are made up of several parts:
• HARDWARE
– physical equipment required to create, use, manipulate and store electronic data
JBAG 2011 JBAG 2011
JBAG 2011
Computer Components
• SOFTWARE – Instructions that tell the hardware what
to do
• PEOPLEWARE – Computer programmer: writes software – User: purchases and uses software
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