Encyclopedia article that defines and explains freeware. It lists a number of kinds of freeware as well, and each has a link to additional information.

Encyclopedia article that defines and gives a brief history of computer shareware. Also includes sections on implementations, logistics, criticism of the shareware concept, examples, and external links.

Encyclopedia entry that defines an encapsulated PostScript, or EPS, and explains how and why it was created. Links to related information are available as well.

Encyclopedia entry that defines a Tagged Image File Format (abbreviated TIFF) graphic file and explains how and why it was created. Links to related information are available as well.

Encyclopedia entry for the Pascal programming language that includes a history of the language and a discussion of its impact on computer languages today. Also includes links to additional information.

Provides a definition of linear search in the context of computer science. A number of examples are provided in different computer languages.

Providing a detailed encyclopedia article on the game of cricket, this website includes a general definition, the laws of cricket, a history of the sport, references, and more. Find photos of a cricket match, diagrams showing a standard...

Encyclopedia entry for the seasons. Click on each specific season for more information.

Detailed encyclopedia article for Perseus, the legendary founder of Mycenae and the mythic hero of Greek mythology whose exploits helped establish the hegemony of Zeus and the Twelve Olympians in the mainland of Greece. Perseus was the...

Encyclopedia article about nymphs in Greek mythology, "any member of a large class of female nature spirits, sometimes bound to a particular location or landform." Discusses classifications of nymphs and provides a picture as well.

Encyclopedia article that discusses the "Erinyes or Eumenides (the Romans called them the Furies) [who] were female personifications of vengeance." Provides a summary of their role in Greek mythology, a discussion of their use in...

Definition and explanation of a weighing scale. Includes balances, spring scales, hydraulic scales, and electronic scales.

Luigi Galvani discovered the galvanic cell by experimenting with nerves on a frog leg! This on-line encyclopedia discusses how to find the electric potential of a galvanic cell along with an explanation of how unwanted galvanic cells are...

Have you ever wanted to grow plants without soil? This site will give you seven techniques to do just this. Additionally, learn about the history of hydroponics, problems associated with hydroponics, and possible future uses.

Visit this site to learn much about the life of German composer, Richard Wagner. Besides biographical information topics of interest include classical music, operas, symphonys, and other musical works.

Detailed encyclopedia article about the Lebanese writer. Although mainly a biography, it also includes a picture, bibliography of his works, and links to more information.

Gravitropism (or geotropism) is how a plant responds to gravity. Roots have a positive reaction to gravity and they grow toward it. Stems have a negative reaction and grow away from gravity. Learn more about what happens inside a plant...

Encyclopedia article on microphones that provides information about kinds of microphones and microphoning techniques. There are also links to microphone manufacturers and additional information.

On-line encyclopedia provides information pertaining to Alphonse Bertillon's life work and accomplishments, particularly in the area of forensic science.

This detailed article includes a history of speed skating, information on rules, different tracks and competitions, and links form more information. A good starting point for students researching this Winter Olympics sport.

Detailed information on nineteenth-century scientist and natural philosopher John Tyndall.

A biography of Apple co-founder Steve Jobs gives details on his various business ventures, such as his founding of Apple Computers with Steve Wozniak, his time at Pixar and NeXT, and his return to Apple in 1997.

Detailed information on the Great Pyramid of Giza, including discussions of its construction, materials used, dimensions, purpose, maps, and photographs.

This brief explanation of punctuated equilibrium includes paragraphs on the history of the theory and the controversy surrounding it.