Index of Terms

Cache
The action of storing Web files for later reuse so that they can be accessed more quickly by the end-user. If the end-user asks for the same thing again, instead of issuing another Internet request, the computer can simply use the copy from the Cache thus improving your Web browser's performance. In other words when you return to that particular Web page (even if you just hit the back button), the information doesn't have to be downloaded all over again. The cache is a form of high-speed memory that your computer sets aside to store frequently accessed data; once the data is stored, it can be retrieved directly from your hard drive rather than from a server.

CGI - Common Gateway Interface
A set of rules that describe how a web server communicates with another piece of software on the same machine, and how the other piece of software talks to the web server. Usually, a CGI program is a small routine that takes data from a web server and does something with it, like putting the content of a form into an e-mail message, or turning the data into a database query.

CGI Scripts
Programs that run on a web server, in response to input from a browser. CGI scripts link the server and a program running on the system. For example, CGI scripts are used with interactive forms.

Click through rate
Number of people who click on the banner divided by times banner is displayed, represented in percentages. Example: 100 people click on a banner that has been displayed 1000 times: 100/1000 x 100= 10%.

Client Side Programming
Client-side programming describes any code/software/scripts that are designed to be executed by the web browser.

CMYK
Stands for the colors Cyan-Magenta-Yellow-Black. In print design, colors are defined as a percentage of each of these 4 colors. For example, the CMYK abbreviation for the color black would be 0-0-0-100. In contrast, display devices (i.e. computer monitors) typically define colors using RGB.

Co-location
Most often used to refer to having a server located at a dedicated facility. Co-location facilities offer customers a secure place to physically house their hardware and equipment with a secure cage, regulated power, a dedicated Internet connection, online security, and online technical support.

Color Cast
A color cast changes the hue (color) of a selected part of an image while keeping the saturation and brightness intact. Viewing an image with a color cast can be similar to viewing it through colored lenses on eyeglasses. A commonly known color cast (in graphic design) is a duotone.

Compression
A method of packing data in order to save disk storage space or download time. JPEGs are generally compressed graphics files. Compression is a technique to make a file or a data stream smaller for faster transmission or to take up less storage space.

Concept Creation


Cookie
A small file that a Web server automatically sends to your computer when you browse certain Web sites. Cookies contain certain information that identifies each user, for example: login or username, passwords, shopping cart information, preferences, and so on. When a user revisits a Web site, the cookie file helps establish the user's identity, thus eliminating the need for the customer to reenter the information. Cookies are stored as text files on your hard drive so servers can access them when you return to Web sites you've visited before Cookies are usually set to expire after a predetermined amount of time Cookies cannot get sensitive data from your computer other such as your email address or any information that you didn't give the requesting page in the first place.

CPC - Cost Per Click
An online advertising payment model in which advertisers pay only for the number of clickthroughs - the number of clicks on their banners, meaning you pay only for the visitors you get.

CPM - Cost per 1000 impressions
A marketing term meaning the amount of money charged for one thousand banner impressions. The "M" comes from the French term mille, which means thousand. You pay a fixed sum for displaying your banner to 1000 visitors. For example, a $30 CPM represents $30 per 1,000 displays of an ad banner.

CSS - Cascading Style Sheet
Abbreviation for Cascading Style Sheet, a feature of HTML developed by the W3C. With Cascading Style sheets, both web designers and end users can create style templates (sheet) that specifies how different text elements (paragraphs, headings, hyperlinks, etc.) appear on a web page. Currently, not all browsers express CSS formatting in the same manner.

Index of Terms