Definitions

All definitions taken from wikipedia. Please feel free to change if you aren't satisfied with the definition. We can discuss online.

A **social network** is a [|social structure] made of individuals (or organizations) called "nodes," which are tied (connected) by one or more specific types of interdependency, such as friendship, [|kinship], financial exchange, dislike, [|sexual relationships], or relationships of beliefs, knowledge or prestige.
 * //__Social network__//**

**Professional development** refers to skills and knowledge attained for both personal development and career advancement. Professional development encompasses all types of facilitated learning opportunities, ranging from college degrees to formal coursework, conferences and informal learning opportunities situated in practice.
 * //__Professional developmen__t//**

Web 2.0" is commonly associated with [|web development] and [|web design] that facilitates interactive [|information sharing], [|interoperability], [|user-centered design] and [|collaboration] on the [|World Wide Web].
 * //__Web 2.0__//**

A **blog** (a [|contraction] of the term "**weblog**")[|[1]] is a type of [|website], usually maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in reverse-chronological order.
 * //__Blog__//**

**Microblogging** is a form of multimedia [|blogging] that allows users to send brief text updates or [|micromedia] such as photos or audio clips and publish them, either to be viewed by anyone or by a restricted group which can be chosen by the user.
 * //__Micro-blog__//**

A **wiki** is a [|website] that uses [|wiki software], allowing the easy[|[1]] creation and editing of any number of [|interlinked] [|Web pages], using a simplified [|markup language] or a [|WYSIWYG] text editor, within the browser. A digital media file containing any or all of text, graphics, audio, video, and animation, which recombines and modifies existing digital works to create a derivative work.
 * //__Wiki__//**
 * //__Mashup__//**