Which 1947 Invention paved the way for the Digital Revolution?

Aconstruction company is creating a powerpoint presentation describing how they calculate costs during each construction step. they plan to email this presentation to clients. the individual clients will be watching the presentation slide show on their own personal computers. what is the most important formatting step the company should take to make the text readable and pleasing to the eye?

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)

Visualizing a game of “tag” to remember the meaning of contagious