Dr. Annie Gray

Well, here's Marcia's hunch.

Most of the population then and now, they're interested in murder mystery games.

There are versions on the television, aren't there, with traitors.

It is a lovely legacy.

They've left a source of fun and entertainment for the whole family.

So who did invent Cluedo?

Well, from the evidence we've gathered, it was Mr and Mrs Pratt in their front room with a little imagination and some time on their hands.

The events themselves were probably the biggest concerts you would have had in that country for a long time.

We were getting like, you know, three, four hundred people into a recording studio.

That's Amjad Farooq Alvi, one of the brains behind the development of what is thought to be the first personal computer virus.

It was named after his company.

To understand how he became obsessed with computing, we need to go back to when he was growing up in Pakistan.

Skipping school paid off as he went on to get a degree in maths and physics.

He and his brothers set up their company in a shop in Lahore.

Soon, Word started selling IBM PC compatibles.

Computer maker IBM has been regarded as the electronics company which could not only match the Japanese, but actually defeat them.

I started selling and maintaining those computers also.

Business was growing for the brothers, but Amjad couldn't stop messing around with computer coding.

He continued to develop his fun programmes, surprising his friends with different stories and phrases popping up on the screen whilst they were hard at work on their computers.

Amjad and his brothers kept on writing and selling software.