We started with a level based system but found that players were being restricted from using gear, so we scrapped it for the tier system.

FORBES: Firefall and Red 5 Studios At PAX East 2013

The Alliance Support for High Availability segment engages Microsoft Certified Support Center high-availability providers to offer service-level commitments based on system availability.

CNN: Microsoft hopes to soothe customers with support plan

There were subsequent plans to introduce an admissions system based on actual A-level grades - a so-called post-qualifications applications system - but this was abandoned last year.

BBC: 'Unfair' university admissions claim

We have also worked to develop a nationwide, community-based prevention system that joins stakeholders at every level of government with local organizations that can deliver local solutions.

WHITEHOUSE: The White House

"The dominant food-production system is based on fossil fuel at every level, " said Dr Martin Caraher, professor of food and health policy at London's City University.

CNN: Farm in the city could be supermarket of the future

"The dominant food production system is based on fossil fuel at every level, " says Dr Martin Caraher, Professor of Food and Health Policy at London's City University.

CNN: Futuristic farm shop grows food in synthetic veg patch

"The Color-coded Threat Level System is used to communicate with public safety officials and the public at-large through a threat-based, color-coded system so that protective measures can be implemented to reduce the likelihood or impact of an attack, " according to the DHS Web site.

CNN: Experts question U.S. terror alert system