Unit 27: Communication systems

Telecommunication: the transimission of signals over a distance for the purpose of communication.

fax: a facsimile(ban sao chep) machine that operates by scanning a paper document so that the image is sent to a receving machine which produces a copy of the original.

teletex: a method of communicating inf by using TV signals.

teleworking: the practice of working at home and communicating with the office by phone and computers.

call centre: a large office in which a company’s employees provide information to its customers or sell or advertise its goods or services by telephone.

telemarketing: the process of selling goods and services over the telephone.

digital TV: transmitting pics by means of digital signals, in contrast to the analonue signals used by traditional TV.

set-top box: a device that connects to a TV and to an external source of signal and converts the signal into content then displayed on the TV screen.

DMB=Digital Multimedia Broadcasting:

DVB-H:Digital Video Broadcast-Handheld:

BlackBerry: wireless handheld device, developed by Research in Motion, which provides email, phone, text messaging, web browsing, an organizer, as well as instant messaging and corporate data access.

GPS: global positioning system.a navigation system formed by various satellites….

wearable computer: a computer that is worn on the body, or integrated into the user’s clothing.

passive tenses

Unit 26:

Present perfect simple & present perfect continuous

Unit 24:

machine code: binary code numbers, the only langugue that computers can understand directly.

assembly language: a low-level language that uses abbreviations such as ADD, SUB and MPY to represent instructions.

assembler: a special program that convert a program written in a low-level language into machine code.

low –level language: a programming language that is very close to machine language.

high-level language: a language in which each statement reprents several machine code instructions.

FORTRAN: the first high-level programming language and compiler, developed in 1954 by IBM. Today, it is still used in mathematics, science, and engineering. Short for FORmula TRANslation

COBOL =Common Business Oriented Language: a high-level programming language developed in 1959 and mainly used for business applications.

BASIC: a high-level programming language developed in the 1960s, widely used in programming because it was interactive and easy to use. Short for Beginner’s All-purpose Symbolic instruction Code.

VISUAL BASIC: a high-level lang, developed by Microsoft in 1990s, used to create graphical user interfaces in Windows app.

PASCAL: a high-level language created int 1971…

C: a high-level programming language developed in 1972 at AT&T Bell Labs. It is used to write system software, graphics and commercial applications.

Java: the programming language from…

compiler: a special program that converts a source program (written in a high-level language) into object code (machine code) in one go.

interpreter: a special program that translates the source code line by line, as the programming is running.

markup language: a computer language that uses instructions, called  markup tags, to format and link web documents.

HTML: the language used to create hypertext documents(web pages…) allows us to create our tags to better describe data.

XML=Extensible Markup Language:

VoiceXML: a markup lang which makes web content accessible via voice and phone.

the infinitive

Unit 22:

hypetext: text that contains links to other documents.

hypermedia: a form of enriched multimedia which supports linking graphics, sound, and video elements in addition to text elements.

interactivity:

sound card: an expansion card that processes audio signals, also called a sound board.

MIDI=Musical Instrument Dital Interface:

DAW=Digital Audio Workstation:

MP3: a standard format that compresses music files, enabling them to be transmitted over the Net more easily.Or, a file containing a song or other audio data that is encoded using the MP3 standard.

MPEG : a standard for compressing and decompressing video files developed by the Moving Pictures Experts Group.

CD ripper: a program that extracts music tracks and saves them on disk.

streaming audio technology:

webcast:

plug-in: special prog which extend the capabilities of a web browser so that it can handle audio, video, 3D animation elements.

video computing:

digital format:

digital video camera: a camera that records moving images and converts them into digital data; also called a camcorder.

video editing:

multimedia:

conditional sentences

Unit 19: Internet security

hacker: someone who invades(xam nhap) a network’s privacy.

cracker: an intruder(vao bua) who breaks into computer systems for funm to steal inf or to propagate (truyen going) viruses.

cookies: small files used by web servers to know if you have visted their site before.Cookies can store user information but do not read your hard disk.

digital certificate: a file that identifies a user or a web server; like a digital certification card.

SSL =Secure Sockets Layer:

encryption:

decryption: the process of decoding (deciphering: su giai ma) secret data.

freeware: software that is available free of change, but protected by copyright.

password:

firewall: a software and/or hardware device that allows limited access to an internal network from the Net. This prevents intruders from stealing or destroying confidential data.

malware: malicious software, created to damage computer data.

virus: a piece of SW which attaches itself to a file.

worm:

Trojan: malicious SW disguised as a userful prog.

spyware: a type of software that collects inf frome your  pc without your consent.

past simple

The others

colour depth: the number of bits used to hold a colour pixel, this determines th number of colours that a monitor can display.