Most histories of computing leave out the contributions of the American number theorists in the early 20th century who constructed specialized computing devices.
Here are a few web pages with information about their computing devcies:
Also, here's an interesting book review of a recently published book about the origins of the computing age: Turing's Cathedral: The Origins of the Digital Universe
Artificial Intelligence (usually called "AI") has long been a fascination of computer scientists and the general public, and has been growing increasingly important recently.
Another printing technology: Dye sublimation printer