Postmodernism is a term used by philosophers, social scientists, art and social critics to refer to aspects of contemporary art, culture, economics and social conditions that are the result of the unique features of late 20th and early 21st century life. These features include phenomena such as globalisation, consumerism, branding, the fragmentation of authority, and the knowledge economy. An important characteristic of postmodernism is that we now have myriad different symbols and metaphors through which we can view the world – these include politics, religion, consumerism, science, art etc... Anything that cannot be physically sensed, such as social justice or one's concept of God, must be referred to by metaphor and symbol. The result is that meaningful communication about issues such as families, politics, sexuality, crime & violence without the use of shared metaphors and symbols is impossible. Some common metaphors in use today include:

• Religion and God

A paradigm is a self-consistent set of ideas and beliefs which acts as a filter, influencing how we perceive and make sense of the world. The way in which we often structure our organisations is based on the model of a Egyptian pyramid and is an example of a paradigm. Other examples of paradigms include – how to make bread, what a bed looks like, the characteristics of a chair that lend the idea of “chairness”, the general features of a ship or an aircraft and so on. The term was first used by Thomas Kuhn in “the structure of scientific revolutions” (1962) to describe the the impact of change within the ruling theory of science when fundamental assumptions changed. Kuhn argued that the history of science is not a linear and continuous assimilation of facts but rather a number of revolutions in which new paradigms or new ways of seeing the world, entirely replace the old. Some of his conclusions include:

Virology has provided our culture with many useful insights and the term 'viral' and the viral metaphor spring up in the form of computer viruses, viral marketing, memetics and memeplexes. Human beings are by nature metaphorical beings and understand complex concepts through metaphor and analogy. In other words, we understand something in terms of something else.

However, trying to understand a virus in terms of a virus throws the thinker into ever more greatly convoluted loops of logic. To think about HIV, what we need is a good metaphor for HIV - what is it 'like'? What organisms or systems do we know of that do the things HIV does? Could the emergent properties of billions of human beings transacting with each other be doing to our planet what HIV does to our bodies?

Without an operating system, computer hardware is inanimate and about as capable as a brick. In the early days, the operating system was considered to be an integral part of the computer until a brilliant move by Bill Gates when the hardware was separated from the operating system with MS.DOS Version 1.0. From this point, the operating system became glamorous, glitzy and branded as a consumer product - and had to be paid for separately to the hardware.

I use 3 operating systems - MS.Windows XPPro , Ubuntu 9,04 (Jaunty Jackalope) and Windows Mobile 6.0 on my HTC palmtop. I first started using Linux about 4 years ago. Up 'till then I used Microsoft exclusively apart from my experiences with some of the more exotic operating systems of the early 1980s which included the Commodore PET (with 16Kb RAM!), the Sinclair ZX-81, an o/s for designing integrated circuits called Gaelic and even an O/S called Gerbil.