Caching or Cache is a component that transparently stores computed data so that future requests for the same can be served faster. A Cache hit is a process of loading the data from the cache memory and a Cache miss is a process of fetching/recomputing data from its original storage location. Cache hit is comparitively faster than a Cache miss, which further results in the serving requests faster and improving the overall performance of the system.

Cacti is an open-source, web-based network monitoring and graphing tool designed as a front-end application for the open-source, industry-standard data logging tool RRDtool. Cacti allows a user to poll services at predetermined intervals and graph the resulting data. It is generally used to graph time-series data of metrics such as CPU load and network bandwidth utilization.

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CakePHP is an open source web application framework. It follows model view controller(MVC) approach and is written in PHP, modeled after the concepts of Ruby on Rails, and distributed under the MIT License

The practice or process of regulating traffic volume in voice communications, articularly in wireless mobile networks and in VoIP. CAC can also be used to ensure, a certain level of audio quality in VoIP networks.

Call blocking, also known as call block, call screening, or call rejection, allows a telephone subscriber to block incoming calls from specific telephone numbers. This feature may require an additional payment to the subscriber's telephone company.

It is a centralized office for the purpost of receiving or transmitting large volume of telephone requests. There are 2 types of call centers. Inbound call centers act as support centers for product queries where as Outbound call centers act as telemarketing centers trying to sell various products and services to customers.

Call forwarding, or call diversion, is a telephony feature of some telephone switching systems which redirects a telephone call to another destination, which may be, for example, a mobile telephone, voicemail box or another telephone number where the desired called party is available.

Call recording software records telephone conversations over PSTN or VoIP in a digital audio file format. Call recording is distinct from call logging and tracking, which record details about the call but not the conversation; however, software may include both recording and logging functionality.

Calligo is a document assembly and enterprise content management system developed by Insystems. It allows the document assembly input and output to be managed within the context of a document management system.

A Calling card is a small plastic card used to pay for telephone services. The call can be made using an access telephone number to dial and the PIN. Calling cards are available as Prepaid discarded and Prepaid rechargable.

A language based on XML that lets a company describe a phone-to-Web site application in terms of how the call would be handled at the Web site and how it would interact with the caller based on keyed-in or voice responses. 

Calypso is a global application software provider that delivers an integrated suite of trading and risk applications to the capital markets function within banks and other companies participating in the world’s financial markets.

A portable electronic recording device capable of recording live-motion video and audio for later playback. Camcorders have three major components -- a lens , an imager, and a recorder.

A software suite, created and published by TechSmith, for creating video tutorials and presentations directly via screencast, or via a direct recording plug-in to Microsoft PowerPoint.

Canary testing pushes a programming code changes to a small number of end users who have not volunteered to test anything. The goal of a canary test is to make sure code changes are transparent and work in a real world environment.