Back then, the effort was considerable: Presentations were made with overheads if you were lucky, but often with 35-milimetre slides laboriously prepared by a graphics-service department.

This PowerPoint presentation explains why. Make these slides the last ones ... more than 30 million PowerPoint presentations are given ... used as a means for a dynamic engagement, ...

As virtual presentations become ubiquitous, tools like Mentimeter and Slido provide invaluable opportunities for real audience engagement and candid employee feedback ...