In analog technology, a wave is recorded or used in its original form. So, for example, in an analog tape recorder, a signal is taken straight from the microphone and laid onto tape. The wave from the microphone is an analog wave, and therefore the wave on the tape is analog as well. That wave on the tape can be read, amplified and sent to a speaker to produce the sound.
In digital technology, the analog wave is sampled at some interval, and then turned into numbers that are stored in the digital device. On a CD, the sampling rate is 44,000 samples per second. So on a CD, there are 44,000 numbers stored per second of music. To hear the music, the numbers are turned into a voltage wave that approximates the original wave.
Random Access Memory (RAM) -
The most common type of memory for a computer. A computer's volatile or temporary memory. RAM stores data and programs while they are being used and requires a power source to maintain its integrity.
Read-Only Memory (ROM) -
Permanently stores its data, even when the computer is shut off. ROM is nonvolatile because it never loses its contents. ROM holds the instructions that the computer needs to operate.
World Wide Web –
combines text, images and time-based media in a network of pages connected by links
Data (computer) –
are the quantities, characters, or symbols on which operations are performed by a computer, being stored and transmitted in the form of electrical signals and recorded on magnetic, optical, or mechanical recording media.
Program -
is a set of data that consists of a series of coded software instructions to control the operation of a computer or other machine.
Hypertext –
linked pages of text.
Hardware –
the machines, wiring, and other physical components of a computer or other electronic system.
Software –
the programs and other operating information used by a computer.
Title (resource) –
The name by which the resource is formally known.
Creator (resource) –
The person, organization or service who made the content of the resource, for instance, the writer of an article or the photographer who took a picture.
Subject (resource) -
One of the topics of the resource. It is usual to choose keywords from an accepted classification scheme as the subject.
Publisher (resource) -
The publisher is “responsible for making the resource available”. This might be a commercial publisher, an academic institution or an individual.
Contributor (webpage) –
A person or organization that has contributed to the content.
Format (resource) -
The type of media of the resource.
MP3 –
The best known form of audio compression.
Cyberbully -
The electronic posting of mean-spirited messages about a person (as a student) often done anonymously
Database -
A database is an organized collection of related information that can be used for searches. An application that helps manage large collections of information.
Desktop -
The background on the windows, menus, and dialog boxes on a PC. It is supposed to represent a desk.
E-mail -
Sending and receiving messages through a computer network. This process requires a computer, modem or network connection, and an e-mail address.
Home page -
An introductory screen on a web page on the World Wide Web, used to welcome visitors. A home page can include special text or graphics on which you click to jump to related information on other pages on the Web. Keyword -
A word or reference point used to describe content on a web page that search engines use to properly index the page.
Password -
A code for the security protection to allow access to a computer or the computer programs.
Paste -
To insert the last information that was cut or copied into a document. Cut and paste can be used to move information within or between documents.
Search Engines -
- Software that searches, gathers and identifies information from a database based on keywords, indices, titles and text.
URL Address -
Uniform Resource Locator Website address. Example: http://www.iss.k12.nc.us
User name -
First part of an e-mail address. Example: jmwinton is the user name of the following e-mail address. jmwinton@iss.k12.nc.us
File format –
specific structure or arrangement of data stored as a computer file.
Hacker -
An unauthorized person who secretly gains access to computer files.
Keyboard -
The hardware device used to enter letters into the computer.
Retrieve (document) -
open the same document
No comments:
Post a Comment