more on hardware

Removable media devices consist such as CD, DVD,blue ray disc, HD DVD, floppy disk, lomega zip drive, USB flash drive and tape drive. Compact disc is the most common type of removable media suitable for music and data. There are  two component that is CD ROM drive and CD writer. Digital versatile disc or DVD is a popular type of removable media that store up much information compared to CD. It is most common way of transferring digital video  and data storage. Blue ray disc is a high density optical disk format for data and high definition video. It can store up to 70 times as much information as CD. HD DVD is the discontinued competitor to the blue-ray format. Floppy disk is something outdate storage device consisting of thin disk of a flexible magnetic storage medium. While lomega zip drive is an outdate medium capacity removable disc storage system. USB flash drive is the flash memory data storage devices integrated with USB interface. Its capacities vary from hundred of megabytes to tens of gigabytes. The last is tape drive that is a device that read and write data on a magnetic tape, used for long term storage and backups.

Another example of hardware is secondary storage. It is a hardware that keep data inside the computer for later use and remain persistent even when the computer has no power. Example is hard disk, solid state drive and raid array controller. Sound card is also a hardware or computer. It enable computer to output sound or audio devices as well as accept input from microphone. Most modern computer have sound card built in to the motherboard ,although it is common for us to install separate sound card as an upgrade.

Last example of hardware is input and output peripheral. It is typically house external to the main computer chasis. Input is for example text input devices (keyboard), pointing devices (mouse), gaming devices (game controller), image video input devices (image scanner) and audio input devices (microphone). Whereas output is for example is printer, speaker and monitor. Keyboard is a device to input text and character by depressing buttons. Mouse is pointing device use to detect two dimensional motion relative to its supporting surface. Another example of pointing devices include trackball and touch screen. Example of gaming devices such as gamepad that hand held game controller that relies on digit to provide input. Image video input such as webcam is low resolution video camera to provide visual input. Whereas microphone is audio input devices that provide input by converting sound into electrical signal. Output of speaker Is a pair of devices which convert electrical signal into audio.