A B C D E F G

H I J K L M N

O P Q R S T U

V W X Y Z

caching
The storage of web files for later re-use at a point more quickly accessed by the end user.

call to action (CTA)
A call to action is the copy on your website that asks your visitors to take a particular action. Calls to action can cover a range of activities such as buying a product, completing a survey, or subscribing to a newsletter or feed. If you want your call to action to be effective, you must lead up to it. Build your credibility, explain the benefits of your product or service, convince your visitors what’s in it for them, and then when they’re finally ready, ask for the sale with a call to action. Example: “Click here to order NOW - risk free”

CAN-SPAM
The CAN-SPAM Act established the United States’ national standards for sending commercial email, and it’s enforced by the Federal Trade Commission. CAN-SPAM is an acronym for Controlling the Assault of Non-Solicited Pornography and Marketing, although it’s likely that the name is derived from the acronym instead of the other way around. Anyone who uses email marketing as a way to promote their business must adhere to CAN-SPAM’s three basic types of compliance:
1. CAN-SPAM “Unsubscribe” Compliance
• Every email you send must include a way for your recipients to unsubscribe from your mailing list
• Requests to be removed from your list must be honored within 10 business days
• Opt-out lists cannot be used for any purpose except compliance
2. CAN-SPAM “Content” Compliance
• Your “From:” lines must be accurate
• Your subject line must be relevant relative to the offer in the body content, and not deceptive
• Adult content must be labeled as such
• You have included a legitimate physical address for the publisher and/or advertiser
3. CAN-SPAM “Sending Behavior” Compliance
• You may not use open relays to send messages. An open mail relay is a mail server configured in a way that allows anyone on the internet to send mail through it, not just mail destined to or originating from known users
• You may not send emails to a harvested email address
• A message cannot contain a false header.

captcha
This is an abbreviation for "Completely Automated Public Turing test to tell Computers and Humans Apart." It is a challenge-response testing system: typically an image that contains a series of ambiguated characters that the reader must retype in a given field. Captcha was created mainly to combat the spam problem as many black hat programmers write programs that can automatically access online services. These programs are made for various purposes, such as creating new email addresses, forum accounts or blog comments for the purpose of spamming.

CSR (certificate signing request or certification request)
In public key infrastructure systems, a certificate signing request is a message sent from an applicant to a certificate authority in order to apply for a digital identity certificate. Before creating a CSR, the applicant first generates a key pair, keeping the private key secret. The CSR contains information identifying the applicant, and the public key chosen by the applicant. The corresponding private key is not included in the CSR, but is used to digitally sign the entire request. The CSR may be accompanied by other credentials or proofs of identity required by the certificate authority, and the certificate authority may contact the applicant for further information. If the request is successful, the certificate authority will send back an identity certificate that has been digitally signed with the private key of the certificate authority.

CSS (cascading style sheets)
Cascading style sheets are used in web design to control the appearance of fonts, colors, images, backgrounds, and layout -- or in other words, the style of your site. Using CSS enables you to separate your content from your presentation, which is great for improving accessibility, providing more flexibility for making changes to the look of your website, and reducing the complexity of your HTML.

CGI script (Common Gateway Interface scripts)
CGI scripts are the most common way for web servers to interact dynamically with users. CGI scripts are compatible with any browser as they are server-side programs instead of client-side -- which means the visitor’s computer doesn’t run the script, your web server does. HTML pages that contain forms often use a CGI script to process the form’s information and then react to it.

chatbot (also called chat bot, chatter robot, chatterbot)
A computer program designed to simulate conversations with human users by the means of text or sound. Such programs are sometimes called Artificial Conversational Entities. The aim is to fool the user into thinking that the conversation has been produced by a real human being. Chatbots are often used in dialog systems for various practical purposes such as online help, or information acquisition. They are also employed to capture marketing leads from users of social media platforms like Twitter.

chat room
A chat room is an online space that allows users to interact with one another in real-time. Chat rooms are often formed around a common interest or topic. Some chat rooms include voice and graphics, but they are nowhere near as common as text-only chat rooms. It is important to consider that when you are entering a chat room you are walking into an existing conversation, and the participants will expect you to respect their rules and conventions. If you don’t, you run the risk of getting booted from the chat room.

click and mortar business (also called C&M business)
A click-and-mortar business is one that has both an offline presence and an online presence. Click-and-mortar businesses generate income from both the online and offline properties in a variety of ways, including:
• Making online sales of offline merchandise. The reach of both businesses is expanded because resources are shared.
• Promoting offline services online, from taking appointments to directing online traffic to your physical store
• Forming strategic alliances with other businesses, online and offline
• Starting an online affiliate program, so you move more of your offline product by having other people sell it for you
• Becoming an affiliate for other businesses so you can offer more products to your existing customer base
(see also brick and mortar business)

click fraud
Click fraud is an Internet crime that occurs when a person, script, or computer program clicks on a