What is drum plotter?

Drum plotter works like a flatbed plotter. It consists of a drum or roller on which paper is placed. The drawing pens are also mounted on the drum. The drum rotates back and forth to draw (or print) the graph on the paper. Drum plotter is used to produce continuous output such as to track earthquake readings.

How laser printer prints the output on printer?

The laser printer has special drum inside it. The laser printer produces an image of the output on a drum with laser beam and magnetically charged powered ink, called toner, and then transfers the image from drum on the paper.

What is thermal printer?

Thermal printer is non impact printer. It can only print output on a special heat sensitive waxy paper. The image of the output is created on the waxy paper by burning dots on it.

What is meant by daisy wheel?

Daisy wheel printer is also an impact character printer. It has a print wheel with series of petals. This wheel is known as daisy wheel.

Define non impact printers?

The printers that produce output on paper without striking the paper are known as non impact printers. They use electrostatic, inkjet and thermal technologies for printing. Laser, inkjet and thermal printers are examples of these type printers.

Define impact printer.

An impact printer prints characters and graphics on the paper with the strikes of hammer or wheel against an inked ribbon. Dot Matrix, Daisy Wheel and Line printers are examples of impact printers.

What is video display adapter?

A computer must have a video display adapter to display output in the form of graphics. Video display adapter is also known as video graphics card that determines the resolution, number of colors, and speed with which images appear on the display screen.

Define hard copy?

The output printed on the paper is called hardcopy. The printers and plotters devices are used for this purpose.

Define softcopy output?

The output received on the display screen or in the audio or video forms, is called softcopy output. This kind of output is not tangible and it cannot be touched.

What is video capture card?

Video input is used to record film and video images. For this purpose, there must be a special circuit board known as video capture card inside your computer. The video capture card converts the video signals into digital signals that a computer can use.

What is audio board?

To enter sound signals inside the computer, a computer must have a sound card. It is a special circuit board also known as audio board.

What is video input device?

Video input device is used to record films and video images. VCR and video camera are examples of video input devices. For this purpose, there must be a special circuit board known as video capture card inside your computer.

What is audio input device?

An audio input device enters analog signals of sound and translates it to digital from store into computer for further processing. The main purpose of audio input device is to provide digital input for multimedia computers. Microphone is mostly used as an audio input device.

Define dedicated fax machine?

Dedicated fax machine is an independent normal fax machine, which can send receive information to and from the other fax machine.

What is smart card?

Smart card looks like a credit card or ATM card it contains a thin microprocessor and memory chip that embedded in it. When this card inserted into card reader (a device used to read the card), it exchanges data with the corresponding information on central computer. It can store and update some basic information also. A mobile SIM card and an ATM card are examples of smart cards.

What is magnetic stripe card?

A magnetic stripe card has stripe of magnetically encoded information on its back. Usually, the magnetic strip cards used for personal identification during driving, in the departmental stores, at public places etc.

What is bar code UPC?

Bar code is a unique identification code in the form of light and dark vertical lines (or vertical zebra-stripped marks) or bars with spaces between them of different widths. It is printed on most of the manufactured products. Actually, the name of products, its price and other descriptions are coded as bar codes. There are several bar coding schemes or systems. The most popular and commonly used bar code is UPC (Universal Product Code).

What is touch pad?

Touch pad is a pointing input device. Touch pad is also known as track pad. It is also stationary device like trackball but it has no moving parts. It is a small flat surface (or sensitive pad) over which we slide our fingertip to move the pointer on the flat surface of touch pad, the pointer (or cursor) moves on the screen.

What is trackball?

A trackball is also a pointing input device. It performs functions like a mouse but it is a stationary device with a moveable ball on its top. The ball is rotated or rolled with finger (or plam of the hand).

What are pointing devices?

A pointing device is an input device that is used to control the movement of the pointer or cursor on the screen and to send command signals to the computer. Usually, the pointing device is used to select items on the screen, to select commands from commands menu, to draw graphs etc.

What is input device?

The devices that are used to enter data and instructions into the computer are input devices. The input device is hardware component. It accepts input (data & programs) in a form that the computer can use, and then sends to the processing unit.