Hard disk drive

hard disk drive (HDD; also hard drivehard disk, or disk drive)[2] is a device for storing and retrieving digital information, primarily computer data. It consists of one or more rigid (hence “hard”) rapidly rotating discs (platters) coated with magnetic material, and withmagnetic heads arranged to write data to the surfaces and read it from them.

Hard drives are classified as non-volatilerandom accessdigitalmagneticdata storage devices. Introduced by IBM in 1956, hard disk drives have been the dominant device forsecondary storage of data in general purpose computers since the early 1960s.[3] They have maintained this position because of advances which have resulted in increased recording capacity, reliability, and speed, as well as decreased cost, allowing them to keep pace with ever more demanding requirements for secondary storage

Computer hardware: the basics

Business benefits of new computer hardware

Before purchasing computer hardware, you should consider what benefits it might bring to your business. This might affect what type of hardware you choose. For example, new computer hardware could:

  • reduce costs by automating routine tasks
  • improve customer service or supplier relationships through more effective electronic communication
  • improve your business efficiency
  • extend your business offer – eg through an online shop, support facility or download centre

Once you have listed the key hardware investments you could make, look at the cost/benefit relationship. This will help you to prioritise them and see which you can afford now, and which can wait.

However, while investing in computer hardware can bring benefits to your business, you should make sure that any hardware you do choose is compatible and worth the investment. For more information, see the page in this guide on buying new computer hardware for your business.

 

COMPUTERS

computer is an electronic device,

which executes software programs. It is made up of two parts – hardware and software . The computer processes input through input devices like mouse and keyboard. The computer displays output through output devices like a monitor and printer. The size of a computer varies considerably from small personal computers to gigantic supercomputers which require an entire building to host them. The speed also has a very large range. Computers have become indispensable in today’s world. Let us take a look at some of their uses.

Word Processing – Word Processing software automatically corrects spelling and grammar mistakes. If the content of a document repeats, you don’t have to type it each time. You can use the copy and paste features. You can print documents and make several copies.

It is easier to read a word-processed document than a handwritten one. You can add images to your document.
Internet – It is a network of almost all the computers in the world. You can browse through much more information than you could do in a library. That is because computers can store enormous amounts of information. You also have very fast and convenient access to information. Through E-Mail, you can communicate with a person sitting thousands of miles away in a few seconds. Chat software enables one to chat with another on a real-time basis. Video conferencing tools are becoming readily available to the common man.

Computers are wonderful machines.

They are everywhere and society depends on them to manage our world. It is no wonder that computers have almost unlimited applications, and that they are multiplying at a steady rate. Many of these applications are benefiting society directly or indirectly.communication methods many other beneficial functions of these machines, such as their use for diagnosing patients, running weather simulations to predict future weather patterns, and calculating large, complex data sets. As new applications emerge for computer systems, so will the benefits society will derive from them.file sharing -

Network file sharing between computers gives you more flexibility than using floppy drives or Zip drives. Not only can you share photos, music files, and documents, you can also use a home network to save copies of all of your important data on a different computer. Backups are one of the most critical yet overlooked tasks in home networking.

uses of computer