Final release distribution Ubuntu 15.04 Vivid Vervet, and derived from it. As releases 14.04 and 14.10, 15.04 release is aimed at improving the stability of the system. Ubuntu - Operating system based on Debian GNU / Linux. The main developer and sponsor is the company Canonical. The project is now being actively developed and supported by the free community. The system contains all the necessary tools you need: Viewer Internet, office suite for word processing, spreadsheets and presentations, programs for communication on the Internet and many others