1. Wiki - Wiki is a website that supports wiki software and allows more than one user to edit the content on the site.Wiki is great for gathering many people in diffent locations in one place.
2.Operating System. - is the software that controls almost everything on the computer, it translate the computer language to one that we could understand and can be personalized in any way.

3.Software - are programs which make your computer experiance more enjoyable. software can do alot of things like play games, do work etc.. but overall software id what makes a computer more usefull.

4.Web 2.0 - A Web 2.0 site allows its users to interact with other users or to change website content, in contrast to non-interactive websites where users are limited to the passive viewing of information that is provided to them. http://en.wikipedia.org/wiki/Web_2.0

5.Social media - Social media is media designed to be disseminated through social interaction, created using highly accessible and scalable publishing techniques. Social media uses Internet and web-based technologies to transform broadcast media monologues (one to many) into social media dialogues (many to many) http://en.wikipedia.org/wiki/Social_media