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HISTORICAL DEVELOPMENT OF DIGITAL DEVICES 2 - STAGES IN THE HISTORY OF DIGITAL DEVICES - JS1 NOTES

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  HISTORICAL DEVELOPMENT OF DIGITAL DEVICES 2 STAGES IN THE HISTORY OF DIGITAL DEVICES Objectives: At the end of the lesson the students should able to 1. Define Age early counting devices 2. State the technology based on Information ages Introduction Historical Development of Digital Devices The historical development of digital devices refers to the gradual improvement of tools and machines used for counting, calculating, processing, storing, and communicating information over time. The development began with simple counting tools and progressed to mechanical calculators, electronic computers, personal computers, and modern smart devices. Early devices were mostly operated manually, while modern devices use electronic circuits, microprocessors, and computer software to perform tasks quickly and accurately. Age Early Counting Devices Long ago, people used different and easily available and affordable counting methods such as fingers, toes, stones, sticks, pebbles, co...
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DIGITAL DIVIDE 1- CONCEPT OF DIGITAL DIVIDE: MEANING, BRIDGING THE GAPS, OLD ECONOMY VS NEW ECONOMY

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 DIGITAL DIVIDE  1-  CONCEPT OF DIGITAL DIVIDE: MEANING, BRIDGING THE GAPS, OLD ECONOMY VS NEW ECONOMY The Concept of Digital Divide The present age is referred to as digital age . It is called a digital age because the current global economy is driven by a digital device known as the computer. The computer represents data and instructions in 0s and 1s called binary codes, hence, it is known as a digital device. One of the reasons for inventing the computer is to reduce the world to a global village. To achieve this, everyone must have access to a computer (mobile phone, laptop, etc.) and internet connectivity. Meaning of Digital Divide Digital divide refers to the gap between people with effective access to digital and information technology and those with very limited or no access at all. Digital Divide, or digital split , is a social issue referring to the differing amount of information between those who have access to the Internet and those who do not have access....
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HISTORICAL DEVELOPMENT OF COMPUTER DEVICES 1 (PRE COMPUTER AGE TO 19TH CENTURY) - SS1 NOTES

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 HISTORICAL DEVELOPMENT OF COMPUTER DEVICES 1  (PRE COMPUTER AGE TO 19TH CENTURY) INTRODUCTION Man has put every effort to have a better method of calculation. These devices were developed for better calculations. The 19th Century Pre Computer Age devices are: 1. Abacus 2. Napier's Bone 3. Slide Rule 4. Pascal's Calculator 5. Leibnitz Multiplier 6. Jacquard's Loom 7. Charles Babbage Difference Engine 8.   BABBAGE’S ANALYTICAL ENGINE 9.  LADY ADA LOVE LACE 10. Hollerith's Census Machine 11. Borough's Machine  (1)   ABACUS :  This is the first calculating device invented by Chinese. It is made up of a frame divided into two parts by a horizontal bar and vertical threads. It is also known Soroban in Japan and Suan Pan in China. It is used for adding and subtracting numbers. (2)     JOHN NAPIER BONE :  In 1917, Scotsman named John Napier invented logarithm which are a technology that allows multiplication. It consists of a set...
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COMPUTER SOFTWARE : MEANING AND TYPES (JS2 NOTES)

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 COMPUTER SOFTWARE MEANING AND TYPES OF SOFTWARE PERFORMANCE OBJECTIVES: At the end of the lesson, the students should be able to: 1. Define Software/Program 2. List the types of software 3. Install software MEANING OF COMPUTER SOFTWARE Computer Software can be defined as an instruction  that directs the  computer  to accomplish a task.  Software are the applications and programming instructions that tell the  computer  what to do and enable it to use it for things such as playing games, writing an essay or listening to  music . Examples of software are: Web Browser, Photoshop, Microsoft Word, Games ( Scratch, Minecraft), Canva, Zoom, Skype, Windows, Linux, iOs, VLC Media Player e.t.c TYPES OF SOFTWARE The major types of software are: 1. System Software  2. Application Software 1.  SYSTEM SOFTWARE : This i s designed to directly operate the   computer   hardware, to provide basic functionality needed by users and other software...
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THE CENTRAL PROCESSING UNIT (C.P.U) 1_SS 2NOTES

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  THE CENTRAL PROCESSING UNIT (C.P.U) 1 Meaning and Components of the CPU - Control Unit (CU) - Arithmetic Logic Unit (ALU) - and Registers Meaning of Central Processing Unit (CPU) The Central Processing Unit (CPU) is the computer component that's responsible for interpreting and executing most of the commands from the computer's other  hardware and software. All sorts of devices use a CPU, including desktop, laptop, tablet computers, and smartphones...even your flat-screen television set. Intel and AMD are the two most popular CPU manufacturers for desktops, laptops, and servers, while  NVIDIA  and  Qualcomm are big smartphone and tablet CPU makers. CPU has different names including processor, microprocessor or the “brain of the computer”. A modern CPU is usually small and square, with short, rounded, metallic connectors on its underside. Some have pins instead of metallic connectors. The CPU attaches directly to a CPU ‘socket’ (or some...
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