The
Kodak Brownie box camera, introduced in
1900, was a very simple camera that anyone could use. Equally important, at an initial cost of one
US dollar, it was also a camera that almost anyone could afford. It introduced the concept of the
snapshot.
The Brownie camera @ 100: A celebration (
http://www.kodak.com/US/en/corp/features/brownieCam/index.shtml)