CDN
A Content Delivery Network (CDN) is a system used in tandem with a web hosting service to help increase efficiency in server response times by caching and saving different types of contents, instead of storing all of the content on a web server. Content can be delivered quickly without bottlenecking all of the requests through one server.

JSON
JSON stands for JavaScript Object Notation. It is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. JSON uses JavaScript syntax for describing data objects, but JSON is still language and platform independent. JSON parsers and JSON libraries exists for many different programming languages.

Knowledge Base Software
A knowledge base (abbreviated KB) software is a special kind of system for knowledge management, providing the means for the computerized collection, organization, and retrieval of knowledge. A knowledge base can also be defined as a collection of data representing related experiences, their results in the form of problems and solutions.

Release Note
A release note is usually a brief summary of recent changes, enhancements and bug fixes in a particular software release. Once the product has been released to production, Release notes is a complementary document which delivered to the customer when a bug is fixed or an enhancement is made to the product. They may be written by a technical writer or any other member of the development or test team.

SaaS
SaaS refers to software that is delivered over the Internet as a service on demand. SaaS differs from the traditional method of purchasing software on CD-ROM or downloadable file to be installed locally on the user’s computer. SaaS vendors develop and operate software applications for customers to use, but the software is usually run all or in part on the vendor’s hardware - a cloud hosted environment. It is a new software distribution model, one that is inevitably the way all software will be delivered in the future.

SSD
A solid-state device or drive (SSD) is the next generation of data storage. The architecture of an SSD does not employ rotating disks at all. An SSD utilizes a memory chip with erasable, writable cells that can hold data even when powered off. Solid-state memory is in popular consumer devices such as iPhone, digital cameras, etc.

SSO
It stands for Single Sign-On authentication. With SSO, user just needs to login once (e.g. to your website or some other web-based application) and he immediately gets authenticated to PHPKB powered knowledge base automatically.

VPN
Virtual Private Network. A network that is constructed by using public wires to connect nodes. The data sent across the Internet is encrypted, so the entire network is "virtually" private.