Term: 1st Term

Week: 7

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 2 periods each

Date:

Subject: Computer Studies and ICT

Topic:- Computing devices(20^th century till date)

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

Explains the features, components and use of the computing devices in the 20^th century till date

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 generations of computer	Students pay attention
STEP 2 EXPLANATION	He explains the features, components and uses of the fourth generation of computers	Students pay attention and participates
STEP 3 DEMONSTRATION	He explains the features, components and uses of the fifth generation of computers	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

COMPUTING DEVICES(20^th century till date)

FOURTH GENERATION

Fourth generation computers appeared between 1970s and 1980s. In this generation, Large Scale Integrated (LSI) technique was used in the integrated circuits. In LSI, more than hundred components were placed on a single chip. This generation of computers brought about the development of microprocessors. 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. Examples are: IBM PS/2, and computers that used Intel (80282, 80386) microprocessors.

FIFTH GENERATION

These generations of computers appeared between 1980s and 1990s. The technique used in the integrated circuits of these computers is Very Large Scale Integration, VLSI. Artificial Intelligence (AI), speech processing, pattern recognition and Expert System (ES) are characteristics of these computers. Artificial Intelligence is the ability of the computer to exhibit intelligence behavior like humans, while Expert System is the ability of the computer to make decisions and judgments like an expert in a particular field of profession.

Generation of Computers	Year of Development	The Technology (input, control, design)	Characteristics	Software Instruction	Storage Capacity
First	1940 – 1950 e.g EDSAC, UNIVAC, EDVAC, IBM 350	Vacuum tube	Gigantic ,Low speeding milliseconds(1/1000^th of a seconds), high energy production	Machine language	Small internal memory and internal storage of magnetic drum and delay lines.
Second	1950 – 1960 e.g. The IBM 605, Honeywell National Cash Register(NCR 304)	Transistor	Less heat generation,	High level and assembler	Core storage
Third	1960 – 1970 e.g. IBM 360, IBM 370 systems	100-1000 chips	Introduction of Integrated circuit(IC),use of operating system, communication cable and reduction in the cost of storage.	Multi programming facilities	internal
Fourth	1970 – 1980 e.g. IBMPS/2, Computers that used Intel (80286, 80386) microprocessor	1000-10⁶ chips	LSI	Introduction of Non-procedural language	Flexible, internal and external and very large, network facilities
Five	1980 – 1990 e.g Compaq, Dell,Toshiba, HP	10⁶ chips	Artificial intelligent(AI),speech production, expert system	Introduction of object Oriented programming language(OOP)	Small but powerful network

EVALUATION: 1a. State the features and components of the fourth generations of computer

State one example of the fourth generations of computer

2a. State the features and components of the fifth generations of computer

State one example of the fifth generations of computer

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively

Lesson Notes By Weeks and Term - Senior Secondary 1