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Graphics and Introduction to CorelDRAW | SS3 Computer Studies Graphics and Introduction to CorelDRAW Senior Secondary 1 Computer Studies What is Graphics? Graphics refers to visual images or designs displayed on a screen or printed on paper. In computer studies, graphics means any picture, shape, drawing, or text you create with the help of a computer. These graphics can be used in posters, logos, magazines, charts, and animations. Types of Graphics There are two main types of computer graphics: Raster (Bitmap) and Vector graphics. Raster (Bitmap) Graphics Easy idea: Imagine a photo made from thousands of tiny colored dots called pixels. Structure: Made up of tiny dots (pixels) arranged in rows and columns. Best used for: Photographs and complex color images. Common formats: JPG, PNG, GIF, BMP. Limitation: When enlarged, the picture becomes blurry or pixelated. Vector Gr...

Units of Storage in Computers STOR Units of Storage in Computer — JSS Friendly Guide Bits, bytes and beyond — conversions and examples explained simply. Introduction Computers store and process information using electronic memory. Storage is measured in units — from the smallest unit, the bit , up to very large units like the terabyte or petabyte . Knowing these units helps you understand file sizes, memory capacity and storage devices. Basic Units — Short Definitions Bit (b): Short for binary digit . A bit can be 0 or 1 — the smallest unit of data. Byte (B): A group of 8 bits. Usually used to measure small amounts of data (letters, small files). Kilobyte (KB): Often used for small documents. In most computing, 1 KB = 1024 bytes . Megabyte (MB): Good for medium files (images, short songs). 1 MB = 102...

Number Base System — JSS2 Student Guide | CMPNote-style NB Number Base System — Complete JSS2 Guide Clear definitions, conversions, arithmetic rules, worked examples and practice — ready for your classroom or blog. Introduction A number base (or radix ) is the number of different digit symbols a number system uses. Each base defines its own digits and place values. The system you use every day is decimal (base 10) . Computers use binary (base 2) , and programmers often use hexadecimal (base 16) . Definition A number base system is a method of representing quantities using digits where the weight of each digit depends on its position (place value) and the base. The base tells you how many symbols exist before you carry to the next place. Example: In base 10 you have digits 0–9. When you add 1 to 9, you carry and get 10 because ...

Operating System — Notes for Students OS Operating System — Student Notes Page 1 of 3 ◀ Prev Next ▶ Definition of an Operating System An operating system (OS) is system software that manages the hardware and software resources of the computer. An operating system is software that controls the overall activity of a computer. The term operating system (OS) denotes the collection of programs that act as an interface between the user’s program and the computer hardware. The main purpose of the operating system is to effectively and judiciously manage the computer system resources, such as processors, main memory, secondary storage, input and output devices and files. Examples of Operating Systems DOS (Disk Operating System) Wind...

SS2 Computer Studies — Computer Data Conversion & Internal Data Flow SS2 Computer Studies — Computer Data Conversion Internal Data Flow & Interactive Notes 1. Data Conversion Data conversion is the process of changing data from one form to another so the computer can understand, store, process, or display it. Example: converting text to binary Example: converting binary to decimal Moving data between RAM and hard drives 2. Registers – The CPU’s Super-Fast Helpers Registers are tiny, high-speed storage locations inside the CPU that temporarily hold data or instructions during processing. Register Function Memory Data Register (MDR) Holds data to be stored or fetched from memory Current Instruction Register (CIR) Stores the instruction currently being executed Memory Address Register (MAR) Holds the memory address of data or instructions Program Counter (PC) Holds the address of the next instruction Accumulator Stores intermediate results fro...

SS3 COMPUTER SCIENCE NOTE TOPIC: THE INTERNET 🌐 💡 Introduction The Internet is one of the greatest inventions of modern times. It connects billions of computers and people around the world, making it possible to share information, communicate instantly, and access knowledge with just a few clicks. Definition: The Internet is a global network of interconnected computers that communicate using a standard set of rules called protocols (mainly TCP/IP) to share information and resources worldwide. 📜 Brief History of the Internet The Internet began in the late 1960s as a U.S. military research project called ARPANET (Advanced Research Projects Agency Network). It was designed to connect computers in different locations so that information could still be shared even if one part failed. Over time, universities and private organizations joined, leading to what we now know as the Internet. 🔧 Key Components of the Internet Servers: Computers that store websites, ...

SS3 COMPUTER SCIENCE NOTE TOPIC: COMPUTER NETWORKS 🌐 💡 Introduction In today’s digital world, computers rarely work alone. They “talk” to each other, share information, and connect us to people and places all over the world. This connection between computers is called a computer network . Definition: A computer network is a group of two or more computers linked together so they can share resources such as files, data, printers, or internet connections. Example: Imagine you and your friends connecting your laptops together so you can all use one printer or share a movie file — that’s a network! 📘 Examples of Computer Networks School computer lab Bank ATM network Office network for data sharing The Internet (the largest network in the world!) 🌍 Types of Computer Networks 1. Local Area Network (LAN) A LAN connects computers within a small area such as a school, home, or office. Example: Computers in a classroom connected to o...