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time sheet calculator allows for input of up to 14 time periods (in hours and minutes), and totals them. It also calculates hours worked by inputing start time and end time.

Do you like explosions, fire, or chemical reactions? Who knew science could be this much fun? Get a degree at Wonder How To with these education how-to videos. Learn how to create hot ice, make things glow in the dark or become a human calculator. Speed read, get homework help, calculate algorithms or brush up on your legal rights. Before you know it, you'll be the teacher instead of the pupil.

Ramven has released Mobile Web Apps for informative and productivity. Our Mobile Web Apps include financial calculators, unit converters and many more categories. These Mobile Web Apps are light weight and support all major mobile, tablet, smart phone and desktop web browsers.

Free web based graphing calculator.

Nice resourceful science site providing illustrations, problem sets, glossary and calculators. 

Making the world's knowledge computable Today's Wolfram|Alpha is the first step in an ambitious, long-term project to make all systematic knowledge immediately computable by anyone. Enter your question or calculation, and Wolfram|Alpha uses its built-in algorithms and a growing collection of data to compute the answer. Based on a new kind of knowledge- based computing

Created by the National Council of Teachers of Mathmatics