Computer Studies Notes
Introduction to Computers
Physical Parts of a Computer
Objectives
By the end of this lesson, you should be able to:
- State and explain various physical parts of a computer
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Definition of a computer
Objectives
By the end of this lesson, you should be able to:
- Define a computer
- Differentiate between data and information
- Explain the unique characteristics of computer as a data processing tool
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Classification of Computers Lesson I
By the end of this lesson you should be able to:
- Classify computers according to their physical sizes
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Classification of Computers Lesson II
By the end of this lesson, you should be able to:
- Classify computers according to purpose
- Explain each of the category of computers above
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Classification of Computers Lesson III
By the end of the lesson, you should be able:
- Classify computers as either digital , analog or hybrid.
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Historical Development of Computers
Objectives
By the end of the lesson, you should be able to:
- Describe the historical development of mechanical computer
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Computer Laboratory
Objectives
By the end of this lesson, you should be able to:
- Define computer laboratory
- State the factors that should be considered when setting up a computer lab
- State and explain measures to protect the computers and computer users
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Hands-on Skills Lesson I
By the end of this lesson, you should be able to:
- Define booting
- Differentiate between cold and warm booting
- Describe the booting process
- Demonstrate the starting of a computer
- Demonstrate the steps of shutting down a computer
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Hands-on Skills Lesson II
By the end of the lesson, you should be able to:
- state and explain various categories of keys on a computer keyboard
- Give examples of the above categories
- type while observing the typing guidelines
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Hands-on Skills Lesson III
By the end the lesson you should be able to :
- Perform the four mouse operations
- Define the four mouse operation terminologies
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Computer Systems
Definition of a Computer System
Lesson Objectives
By the end of the lesson you should be able to:
- Define a computer system
- State and explain the components of a Computer System
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Computer Hardware Lesson I
Lesson Objectives
By the end of the lesson you should be able to:
- Define input devices
- Describe variuos types of input devices
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Computer Hardware Lesson III
Lesson Objectives
By the end of this lesson you should be able to:
- State and explain various special purpose memories
- Define software
- classify software into various categories
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Operating Systems
Introduction to Operating Systems
By the end of this lesson you should be able:
- Define an Operating System
- State and explain functions of operating systems
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Types of Operating System
By the end of the lesson you should be able to :
- Classify operating systems according to numbers of users, user interface and number of tasks
- Describe operating systems in each of the above classes.
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Choosing an Operating System
By end of the lesson you should be able to:
- state factors considered when selecting an operating system
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Introduction to Networking and Data Communication
Networking and Data Communication Terminologies
By the end of the lesson you should be able to:
- Define networking terminologies
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Data Communication
By the end of the lesson you should be able to:
- Define data communication terminologies
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Modes of Data Communication
By the end of the lesson you should be able to:
- State and define the three modes of data Communication
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Types of Computer Networks
By the end of the lesson you should be able to:
- Identify and describe types of computer networks
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Purpose and Limitations of Networking
By the end of the lesson you should be able to:
- explain the purpose of a computer network
- explain the limitations of computer network
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Data Communication Media Lesson I
By the end of this lesson you should be able to:
- To define data communication media
- Describe different types of bounded communication media
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Data Communication Medial Lesson II
By the end of the lesson you should be abe to:
- Describe fibre optics
- Explain how fibre optic transmit data
- state various types of fibre op[tic
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Network Topologies
By the end of the lesson you should be able to:
- Describe bus, ring, and star topologies
- state the advantages and disadvantages of each topology
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Network Software
By the end of this lesson, you should be able to:
- state the network application software
- state and explain the seven layers of OSI model
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Elementary Programming Principles
Computer Programming and Description of Terms
By the end of the lesson you should be able to:
- Define programming
- Define programming language
- Describe terms used in programming
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Levels of Programming Languages
By the end of the lesson you should be able to:
- Classify programming languages as of various levels
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Program Development
By the end of the lesson, the learner should be able to
- List the stages in program development
- Describe
- program recognition
- program definition
- Program design
- Program coding
- program testing
- Program implementation and maintenance
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Internet and E-mail
Internet Interconnectivity Requirements
By the end of the lesson you should be able to:
- Describe various internet connectivity requirements
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Definition of Terms used in Internet
By the end of the lesson you should be able to:
- State and explain the meaning of various internet terminologies:
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Impact of ICT on Society
Effects of ICT on Employment Lesson I
By the end of the lesson you should be able to:
- Describe the effects of ICT on Employment
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Word Processors
Introduction to Word Processors
By the end of the lesson you should be able to:
- Define word processors
- List examples of word processors
- State and explain advantages of electronic word processors
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Security Threats and Controls
Security Threats and Controls
By the end of the lesson you should be able to:
- Define data security
- Identify security threats and control measures
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Security Threats and Controls
By the end of the lesson you should be able to:
- state control measures against hardware failure
- state and explain threats from malicious programs
- state the control measures against malicious programs
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Computer Network Security
- Define Network Security
- Explain the three elements of security
- Explain various types of security
- Explain security control measures
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Career Opportunities in ICT
Career Opportunities in ICT Lesson I
By the end of the lesson, you should be able to:
- Describe career opportunities in ICT
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Career Opportunities in ICT Lesson II
By the end of the lesson, you should be able to:
- Describe various career opportunities in ICT
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Application Areas of ICT
Application Areas of ICT
By the end of this lesson you should be able to : *To explain how ICT is used in accounting systems
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System Development
System Development Life Cycle (SDLC)
- To describe system development process
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System Development
By the end of the lesson, the learner should be able to:
- Describe various methods of system Development
- Describe structured system development method
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Data Representation in a Computer
Introduction Data Representation in a Computer
To define data and information
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DEFINITION OF TERMS USED IN DATA REPRESENTATION IN A COMPUTER
To define various terms used in data representation
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Data Signals
To describe various types of signals
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AMPLITUDE,FREQUENCY ,PERIODIC TIME,WAVELENGTH
- To define :amplitude,frequency,periodic time and wavelength
- To describe data representation in a telephone line
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Databases
Databases
By the end of this lesson you should be able to:
- Define a database
- Disadvantages of manual database
- Define a database management system
- State examples of DBMS softwares
- State functions a database management system software
- State database models
- State features of a database management software
- Create a database using microsoft access
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Desktop Publishing
Desktop Publishing
By the end of the lesson you should be able to:
- Define publishing
- Define Desktop Publishing
- State examples of desktop publishing software
- State the purposes of a DTP software
- State the advantages of DTP's Over Word Processors
- Describe features of a DTP
- Design a publication using a DTP
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Spreadsheets
Spreadsheets
Outline
Introduction to spreadsheets
Introduction to MS Excel
Formatting
Creating formula
Functions
CAT I (Take away)
Functions II
Functions III
Functions IV
Cat II
Charts
Data Analysis
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Spreadsheets
Continued
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Spreadsheets
Excel Continued
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Data Processing
Data Processing
Definition of the terms:
Data, information and data processing
Data processing cycle
Data collection
i) stages of data collection
ii) methods of data collection
Data input
Processing
Output
Description of errors in the data processing
- Transcription errors
- Transposition
Data Integrity
- Accuracy
- Timeliness
- Relevance
Data processing methods
- Manual/conventional
- Mechanical
- Electronic
Computer files
- Elements of computer file
- Logical and physical files
Types of computer processing file
- Master
- Transaction
- Report
- Sort
- Backup
- Reference
File organization methods
- Sequential
- Random/direct
- Serial
- Indexed sequential
Electronic Data processing modes
- Online
- Distributed
- Time-sharing
- Batch processing
- Multi-processing
- Multi-programming/multitasking
- Interactive processing
- Real-time
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