JSS1 First Term Internet and Communication Technology (ICT) Lesson Note – Generation of Computers

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WEEK 6                                                        

TOPIC:  HISTORICAL DEVELOPMENT OF COMPUTERS

CONTENT: Generation of Computers:  First, second, third, fourth and fifth generations.

GENERATIONS OF COMPUTER:

Generation of computers is the developmental stages that the computer has gone through.  There are 5 generations of computers and their accompanying innovations.

1^ST GENERATION

1940 – 1956:  First Generation – Vacuum Tubes

First generation computers were those manufactured between 1940s and 1950s. The computers used the stored program concept. First generation computers were associated with the vacuum tubes or valves technology as circuitry and magnetic drums for memory.

CHARACTERISTICS:

1. They were very bulky and heavy.
2. They measured between 50 – 100ft long and about 80ft high.
3. The computers weighed up to 200 tons and occupied 3000 cubic ft.
4. They used vacuum tubes to store and process data.

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