Lesson Notes By Weeks and Term - Senior Secondary 1

Generations of computer II

Get it on Google Play
Get it on the Apple App Store
  1. Home
  2. Lesson Notes By Weeks and Term
  3. Senior Secondary 1
  4. Generations of computer II

Term: 1st Term

Week: 4

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 2 periods each

Date:       

Subject:      Data Processing

Topic:-       Generations of Computer II

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Discuss the features and characteristics of the fourth and fifth generations of computer

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, pictures, Data Processing for senior Secondary Education by Hiit Plc, WAPB Computer Studies for Senior Secondary I by Adekunle et al, On-line Materials.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher reviews the previous lesson on the first, second and third generation of computers

Students pay attention

STEP 2

EXPLANATION

He discusses the features and characteristics of the fourth generation of computers, listing their examples

 

Students pay attention and participates

STEP 3

DEMONSTRATION

He discusses further the features and characteristics of the fifth generation of computers listing their examples

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

GENERATIONS OF COMPUTER

FOURTH GENERATION

Fourth generation computers appeared at about 1975. The technologies

that characterized these machines were LARGE SCALE INTEGRATION

(LSI) and VERY LARGE SCALE INTEGRATION (VLSI). The computers

produced at this period were of a higher capability in terms of speed,

storage and of superior performance over their counterparts of the third

generation.

CHARACTERISTICS OF FOURTH GENERATION

  1. The fourth-generation computers have microprocessor-based systems.
  2. The fourth-generation computers use VLSI circuits.
  3. Improved speed, accuracy and reliability are seen.
  4. Refinement of the input/output devices seen.

 

FIFTH GENERATION

These generations of computers made use of ARTFICIAL INTELLIGENCE

(AI). This category of computer was built around the following objects.

  1. To build super computer i.e computers which could perform operations in the range of 10 billion instructions per seconds.
  2. They were designed to have capacities like sight and hearing as well as capability to stimulate human thoughts e.g robots.

Generations of computers

Year of development

Technology used

characteristics

Software instruction

Storage capacity

Operation system

Relative speed

1st

1940-1956

Vacuum tubes

Very big an slow in operation

Machine language

Small internal storage(magnetic drum)

Single user(jobs scheduled manually)

1 Hz per second

2nd

1956-1963

Transistor

Less heat generation

High level and assembly

Magnetic core storage

Single user(scheduled automatically)

100 Hz per second

3rd

1964-1971

Integrated circit

Transistors were miniaturized and placed on silicon chips(100-1000) called semiconductors which increased the speed and efficiency of computers. Keyboards and monitors were used

Multi programming facilities

Magnetic disk tapes

Multiple users(time-sharing)

100 Hz per second

4th

1971-present

Microprocessor(with VLSIC)

1000 and above silicon chips. Computers became smaller and to be held in the palm. Speed also increased the more. Use of Mouse, keyboard and monitors

Introduction of non-procedural language 

Flexible internal(HDD & SSD) and external(flash-drive, CD-ROM, DVD) storage

Multiple users(distributed systems)

1 million Hz per second and above

5th

Present and beyond

AI and Expert system

106 silicon chips and above. Devices that responds to natural language input and are capable of learning and self-organization

Introduction of object-oriented programming language

Small but powerful network storage on high mass storage servers

Multiple users(cloud Hz per computing)

1 billion Hz per second and above

 


EVALUATION:    1. Discuss the characteristics of the fourth and fifth generation of computers

  1. Give an example each of fourth and fifth generation of computers

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively