Computer Basics

1. Volatility: RAM is volatile (data is lost when power is off), whereas ROM is non-volatile (data is retained without power).
2. Function: RAM is used for temporary storage of data currently in use by the CPU. ROM stores the startup instructions (BIOS) required to boot the computer.
3. Modifiability: Data in RAM can be read and written to easily. Data in ROM is typically "Read-Only" and difficult to modify.
4. Capacity: Computers usually have a larger amount of RAM (e.g., 8GB, 16GB) compared to ROM (a few MBs).

1. Speed: Computers can process millions of instructions per second, completing tasks in microseconds that would take humans hours.
2. Accuracy: Computers perform calculations with 100% accuracy, provided the input and instructions are correct (GIGO principle).
3. Diligence: Unlike humans, computers do not get tired or lose concentration; they can work continuously with the same consistency.
4. Storage Capacity: Computers can store vast amounts of data in a small physical space and retrieve it instantly when needed.

1. A Pen drive (or USB Flash Drive) is a portable secondary storage device.
2. It is primarily used to store and transfer data (documents, photos, videos) between different computers.
3. It is popular due to its small size, durability, and ease of use (Plug and Play).

1. Headphones are hardware output devices that plug into a computer or audio device line-out port.
2. They allow a single user to listen to audio (music, voice calls, videos) privately without disturbing others.
3. They are essential for high-quality audio experiences in gaming, video conferencing, and multimedia consumption.

1. Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances.
2. It uses short-wavelength UHF radio waves.
3. It is commonly used to connect peripherals like headphones, keyboards, and mice to computers or smartphones without wires.

1. A computer needs a place to hold data (inputs) while processing and data (outputs) before saving or displaying.
2. This electronic storage space is called Memory (e.g., RAM).
3. UPS (Uninterruptible Power Supply) is a battery backup device, not storage.

1. Computers provide access to the vast information available on the internet for research and learning.
2. They enable students to create documents, presentations, and projects efficiently using productivity software.
3. They facilitate distance learning and online education through video conferencing and e-learning platforms.

1. Charles Babbage conceptualized the "Analytical Engine", a mechanical general-purpose computer, in the 19th century.
2. Because of this foundational concept which predated modern electronics, he is historically honored as the "Father of the Computer".
3. Alan Turing is often called the father of theoretical computer science and AI.

1. Businesses deal with large amounts of data regarding customers, sales, and inventory.
2. Information Technology (databases, software) allows this data to be stored, organized, and retrieved instantly.
3. Other uses include communication (email), automation, and online sales (e-commerce).

1. Software is the intangible part of a computer system, unlike hardware which is physical.
2. It provides the instructions required for the hardware to perform specific tasks.
3. Examples include Operating Systems (like Windows) and Applications (like MS Word).