The history of computers, from 1938 to 2010, all illustrated via this informative infographic. Enjoy! [Source: Test King]
Light is energy that can take on many forms. Radio waves, microwaves, infrared, visible, ultraviolet, X-ray and gamma radiation are all different forms of light. (Illustration: NASA/CXC/M.Weiss)
Commonly confused adjectives with explanations.