HEATKEYS

Helping us make and share calculations with MS Excel. XLC software to display MS Excel formulae in mathematical notation. Repository of solved problems covering many engineering topics. Site forum for software support and discussion of calculation. E...

Ecological systems design: gray water systems, gravity feed water supply, rainwater harvesting, cisterns, water conservation, composting toilets, edible landscaping, bicycles.

A site for people who think. Intellectual resources, programming, astronomy, science, mathematics, Java applets, HTML instruction, home of Arachnophilia.

SPX is a global manufacturing and industrial equipment supplier which provides solutions for a range of industries, primarily in the energy sector.

From 1862 to 2013: Tracking the Rise of the Humble Emoji - A City Made From Chewing Gum And Other Amazing Images From This Week - Hacker Breached U.S. Army Database Containing Sensitive Information on Dams -

Designs and fabricates petroleum and liquid-handling equipment including bobtails, transport trailers and truck tanks; in addition to building bulk plants and servicing c-stores with construction management and technical service.

Calculators online for finance, math, algebra, trigonometry, fractions, physics and time. Use an online calculator, search or suggest a new calculator that we can build for free online use. Conversions and calculators to use online for free. Formerl...

Calculator City, calculators for algebra, geometry, trigonometry, calculus, finance, astronomy, physics, chemistry, time cards, HTML Colors, percentages, fractions