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  Computer System 😇 Introduction A computer system is a combination of different parts that work together to perform tasks. It includes hardware, software, data, and users . All these parts are needed for a computer to work properly. 🖥️ Computer System Overview 7 A computer system mainly has: Hardware Software Data Users 1. Computer Hardware Computer hardware means the physical parts of the computer that we can touch and see. Examples: Monitor CPU (Central Processing Unit) Keyboard Mouse Printer Types of Hardware 6 1. Input Devices Used to enter data into the computer. Example: Keyboard, Mouse 2. Output Devices Used to show results. Example: Monitor, Printer 3. Storage Devices Used to store data. Example: Hard disk, Pen drive 2. Computer Software Computer software means programs and instructions that tell the computer what to do. Types of Software 7 1. System Software Helps computer run properly Example: Operating System (Windows, Linux) 2. Application Software Used to do spec...

History of Computer 😇 A computer is an electronic machine that helps us do work quickly and accurately. It can perform calculations, store information, and solve many problems. Today, computers are used in schools, homes, hospitals, banks, and offices. Computers were not always like today. They developed step by step over time. The history of computers is divided into three main eras: Mechanical Era Electromechanical Era Electronic Era Advantages of Computer It works very fast It gives accurate results It can store a large amount of data It helps in learning and education It saves time and effort It is useful in offices, hospitals, and banks Disadvantages of Computer It can cause health problems if used too much It needs electricity to work It can make people lazy It may cause addiction in children It can spread viruses and harmful software It reduces human jobs in some areas 1. Mechanical Era In this era, simple machines were used for calculation. The...

Spreadsheet in MS Excel Introduction Microsoft Excel is a popular spreadsheet application developed by Microsoft. It is used to store, organize, calculate, and analyze data easily. MS Excel is widely used in schools, offices, banks, businesses, and many other fields. A spreadsheet helps users perform calculations automatically and present data in a clear and organized way.                                                                     Fig.1 What is a Spreadsheet? A spreadsheet is an electronic worksheet made up of rows and columns. Rows are represented by numbers (1, 2, 3…) Columns are represented by letters (A, B, C…) The intersection of a row and column is called a cell . Examples: A1 B2 C5 Each cell can contain: Text Numbers Dates Formulas Features of MS Excel MS Excel provide...

  Introduction and Evolution of Computer😊 Computers have become an important part of our daily lives. Today, computers are used in schools, homes, hospitals, banks, offices, and many other places. However, computers were not developed in a single day. They evolved gradually over many years. The development process of computers from simple calculating devices to modern digital computers is called the evolution of computers . The history of computers is divided into different eras based on the technology used during that period. These eras show how computers developed and improved over time. 1. Mechanical Era The Mechanical Era was the earliest stage in the development of computers. During this period, people used mechanical devices made of gears, wheels, and levers to perform calculations. These devices did not use electricity. Major Inventions and Devices of Mechanical Era a) Abacus The Abacus is considered one of the earliest calculating devices. It was invented around ...

Computer System  A computer system is an electronic device that accepts data, processes it, stores it, and produces useful information as output. Computers help people perform tasks quickly, accurately, and efficiently. A computer system is made up of different components that work together to complete tasks. Hardware Definition: Hardware refers to the physical parts of a computer system that can be seen and touched. Hardware helps the computer receive input, process data, store information, and produce output. Examples of Hardware: Keyboard Mouse Monitor CPU Printer Scanner Speakers Types of Hardware 1. Input Hardware Input devices are used to enter data and instructions into the computer. Examples: Keyboard – Used for typing text and numbers. Mouse – Used for pointing, clicking, and selecting items. Scanner – Used to scan pictures and documents. Microphone – Used to enter sound or voice. 2. Output Hardware Output devices display the result...