For the average viewer, 'Tron' is a puzzling film. The language is loaded with jargon, the world experienced by Clu and Tron (inside the computer) appears strange, forbidding and two-dimensional. It is a world that seems to work though, but how does the human Clu instantly know how to adjust to its peculiarities?

Viewers have come to expect that techno-babble jargon in SciFi flicks is completely meaningless. That isn't entirely the case for 'Tron', much of it is firmly based in computing. Even more importantly, this strange world Clu and Tron inhabit is equally firmly based on the way computer operating systems work, and that is the reason why Clu (in real live a computer hacker) knows how to handle it.

Using this world as the basis for a movie was pretty audacious, especially in 1982. Thankfully, the writers did not compromise on their idea, and consequently the film not only worked but it stood the test of time.

'Tron' works, because computers work.

If there was no TRON then there might be no Pixar or no Toy Story. There have been films with CGI before but it was TRON that showed John Lasseter what was possible yet the film makes cunning use of CGI, there is less of it than people think.

The film underperformed on its release and did better as a crossover arcade game. The light cycle sequence certainly helped. 1982 was the year that home computing was taking off in the UK with the BBC computer, Sinclair Spectrum, Commodore 64 entering households in greater numbers and TRON was riding on that wave, even its film score was acclaimed.

The story is simple although it has to be noted Jeff Bridges is not Tron. Bridges is Kevin Flynn a programmer who has been cheated by a rival Dillinger (David Warner) who has taken credit for his work such as best selling arcade games and taken control of the Hi Tech company Encom. Flynn breaks into the Master Control Program (MCP) which has gained its own AI and become a super computer and takes Flynn inside a computer world in order to delete him.

Flynn is helped out by Tron a legendary warrior in this computer world and he also looks like Flynn's friend Alan Bradley (Bruce Boxleitner). They along with others seek to destroy the MCP and get rid of Dillinger.

Critics at the time were not impressed by the story but the film's graphical content, its cutting edge for the time representation of a Matrix style world and use of synthesised music has made the film endure leading to a belated sequel almost 30 years later.