BBC:

At some point in their career, everyone will find themselves sat in a darkened room, eyes squinting at a large white screen in front of them, blinking, as slide after slide whizzes past.

Microsoft PowerPoint is the world’s most ubiquitous presentation tool. Some figures suggest that this all-conquering presentation software is installed on more than a billion computers worldwide and that there may be up to a staggering 30 million PowerPoint presentations created every day.