20. Write the Russian translation of paragraph 4 or 5.

lesson 6. peripherals

Lead-in.

1. Name these peripherals and divide them into input and output devices. What other devices can you add to both lists?

Reading and Vocabulary.

2. You are going to read the text about peripheral devices. These are some words and expressions you may not know.

to attach to be dependent on sth to expand core to improve quality feature common distortion to record main

field majority as well as to incorporate establishment flexibility transducer in response to reinforcement voice transmitter

3. Read and decide which type of peripherals you would advise in each situation shown below the text.

Peripherals

A peripheral is a device, which is attached to a host computer but not part of it, and is more or less dependent on the host. It expands the host's capabilities, but does not form part of the core computer architecture. The examples of peripheral are computer printers, image scanners, digital cameras, webcams, loudspeakers, and microphones.

A printer is a peripheral which produces a text and/or graphics of documents, which is stored in electronic form, usually on paper. A lot of printers are primarily used as local peripherals and are attached by a printer cable or, in most new printers, a USB cable to a computer which serves as a document source. Printers are often slow devices (30 pages per minute is considered fast), and the cost per page is high. However, as printers have improved in quality and performance a lot of jobs which used to be done by professional print shops are now done by users on local printers. Printers which include non-printing features are sometimes called multifunction printers (MFP). Most MFPs include printing, scanning, and copying among their many features. The world's first computer printer was a 19th century mechanically driven apparatus invented by Charles Babbage.

An image scanner (often abbreviated to just scanner) is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Common examples found in offices are variations of the desktop (or flatbed) scanner where the document is placed on a glass window for scanning. These scanners still have some disadvantages such as distortion, reflections, shadows, low contrast.

A digital camera (or digicam) is a camera that takes video or still photographs, or both, digitally by recording images via an electronic image sensor. It is the main device used in the field of digital photography. Most 21st century cameras are digital. Digital cameras can do things film cameras cannot: showing images on a screen immediately after they are recorded, storing thousands of images on a single small memory device, and deleting images to free storage space. The majority, including most compact cameras, can record moving video with sound as well as still photographs. Digital cameras are incorporated into a lot of devices; for example, in mobile phones.

A webcam is a video camera which feeds its images in real time to a computer or computer network, often via USB, Ethernet or Wi-Fi. Their most popular use is the establishment of video links, allowing computers to act as videophones or videoconference stations. This common use as a video camera for the World Wide Web gave the webcam its name. Webcams are known for their low manufacturing cost and flexibility, making them the lowest cost form of video telephony.

A loudspeaker (or "speaker") is an electro acoustic transducer that produces sound in response to an electrical audio signal input. Non-electrical loudspeakers were developed as accessories to telephone systems, but electronic amplification by vacuum tube made loudspeakers more generally useful. Miniature loudspeakers are found in devices such as radio and TV receivers, and a lot of forms of music players. Larger loudspeaker systems are used for music, sound reinforcement in theatres and concerts, and in public address systems.

A microphone (colloquially called a mic or mike) is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. In 1876 Emile Berliner invented the first microphone used as a telephone voice transmitter. Microphones are used in a lot of applications such as telephones, karaoke systems, hearing aids, radio and television broadcasting and in computers for recording voice.

1. inputting printed graphics

2. controlling the screen cursor in a fast action game

3. making choices on a screen in a public information terminal

4. recording moving images

5. printing very high quality text and graphics

6. creating drawings

7. printing building plan drawings

8. recording sound

9. listening to music without disturbing others

10. storing programs and data

11. backing up large quantities of data