Police begin using overhead projectors for
their identification work, quickly followed
by the military, educators,
35mm Slide Presentations
The 35mm slide projector enables
professionals to communicate ideas
sequentially to larger audiences. The
pioneering 35mm slide firm Genagraphics
charges from $300 to $1500 per
The click heard ‘round the world:
PowerPoint 1.0 debuts for the Macintosh.
Suddenly everyone can design slides. Little
consideration is given to whether or not
this is a good idea.
PCs sit on every desktop in the workplace
and high-stakes business communications
evolve from printed documents to digital
presentations. The 35mm slide companies
go extinct almost overnight.
An Inconvenient Truth
Al Gore raises environmental consciousness,
wins an Academy Award, and receives the
Nobel Peace Prize for telling a compelling
story about climate change with little more
than a slide show.
Cognitive Style of PowerPoint
Edward Tufte authors “The Cognitive Style
of PowerPoint.” In it, he suggests that
PowerPoint impaired the quality of the
engineers' investigative analysis on the
Columbia Space Shuttle when it was gravely
impacted by debris.
When you think of presentations, your immediate thoughts probably travel only as
far back as 1987—the beginning of the PowerPoint era. If you broaden your perspec-
tive, you might recall an age of 35mm slides and flip charts—the latter half of the
last century. And though the means and methods have changed over time, the mes-
sages by and large have not: you recount stories, present new information, strive to
change others’ minds. The world is wired for visual as well as verbal communication.
Don’t believe it? Consider this timeline: