Stuart Mitchell reflects on the influence of subjective feelings on a historian's perspective.

Andy Green, CEO of Logica addresses the challenges Cloud Computing business faces, such as security and end-user service.

As part of a review of content, this course will be deleted from OpenLearn on 18 May 2017. It has been replaced by the new course 'Information security'.

Headline news scares about stolen or missing data are becoming a frequent occurrence. This free course, An introduction to information security, discusses the importance of protecting information. Organisations are relying more and more heavily on computers to store sensitive corporate and customer information and this OpenLearn course gives an overview of information security management systems.

Can we protect ourselves against a cyberattack? Digital Planet tried to find out, as this full transcript records.

They're astonishingly powerful numbers. Simon Singh introduces the primes.

What are the prospects for cooperation or cooperation in the international system? Will states always be primarily concerned with their own security or is progressive change possible in international politics? Does it matter to international politics if states are democratic or not? And what is the importance of economic change, or gender relations to international politics? In the following seven films, some of the world's leading experts on international relations explore what determines how states and their agents behave in a globalised world and the different theories and analyses that have been developed to make sense of today's international system.

The development of cities has always been a story of the growth of insecurity

John Grayson works with the South Yorkshire Migration and Asylum Action group (SYMAAG). As private security firms hit the news, he writes about how they contribute to the 'symbolic glass floor' 

How are the civil war in Syria, the remote Norwegian island of Spitsbergen, and the future of the world’s food supplies connected?