Customer engagement is a business communication connection between an external stakeholder (consumer) and an organization (company or brand) through various channels of correspondence.

This connection can be a reaction, interaction, effect or overall customer experience, which takes place online and offline.

The term can also be used to define customer-to-customer correspondence regarding a communication, product, service or brand.

However, the latter dissemination originates from a business-to-consumer interaction resonated at a subconscious level.

Online chat may refer to any kind of communication over the Internet that offers a real-time transmission of text messages from sender to receiver.

Chat messages are generally short in order to enable other participants to respond quickly.

Thereby, a feeling similar to a spoken conversation is created, which distinguishes chatting from other text-based online communication forms such as Internet forums and email.

Online chat may address point-to-point communications as well as multicast communications from one sender to many receivers and voice and video chat, or may be a feature of a web conferencing service.

Streaming media is multimedia that is constantly received by and presented to an end-user while being delivered by a provider.

The verb "to stream" refers to the process of delivering or obtaining media in this manner; the term refers to the delivery method of the medium, rather than the medium itself, and is an alternative to file downloading, a process in which the end-user obtains the entire file for the content before watching or listening to it.

Instant messaging (IM) is a type of online chat that offers real-time text transmission over the Internet.

A LAN messenger operates in a similar way over a local area network.

Short messages are typically transmitted bi-directionally between two parties, when each user chooses to complete a thought and select "send".

Some IM applications can use push technology to provide real-time text, which transmits messages character by character, as they are composed.

More advanced instant messaging can add file transfer, clickable hyperlinks, Voice over IP, or video chat.

Free software, freedom-respecting software, or software libre is computer software distributed under terms that allow the software users to run the software for any purpose as well as to study, change, and distribute the software and any adapted versions.

Free software is a matter of liberty, not price: users, individually or collectively, are free to do what they want with it, including the freedom to redistribute the software free of charge, or to sell it, or charge for related services such as support or warranty for profit.