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PDFill PDF Editor

Open, view, edit, and save PDF files without Adobe Acrobat.

3 stars Editors' rating on Dec 26, 2012
4 stars Users' rating out of 267 reviews
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MyScript Calculator reviewed

If you would like to go back to your early days of learning math using pencil and paper, this app lets you relive those moments, writing math expressions naturally while delivering solutions immediately.

By January 10, 2013

4 stars Editors' rating January 10, 2013

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Get a monthly payment estimate with Google's mortgage calculator

Can you afford that house? Use Google's mortgage calculator to find out if you can swing the monthly payment.

By February 6, 2015

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Calculating the solar efficiency of Superman

Superman's solar power actually contravenes the laws of physics, according to a team of students at the University of Leicester.

By August 3, 2014

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Physicist Hawking calculates something serious: World Cup odds

Stephen Hawking gets together with betting chain Paddy Power to offer his brain power in predicting likely winners.

By May 28, 2014

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Calculate your PC's energy use

Microsoft's free Joulemeter utility gives you a rough estimate of a Windows system's power consumption. Plus: tips for reducing your electronics energy bill.

By April 15, 2014

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Carrying too many credit cards? There's a card for that

Technically Incorrect: The Stratos Card is a new so-called connected card that claims to be a fine solution to wallet overcrowding. But who will pay $95 for it?

By March 2, 2015

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MacBook falls 1,000 feet from airplane, survives the landing

A MacBook Air takes its name too literally when it accidentally launches from an airplane in flight, dives all the way to ground and emerges functioning, though a little roughed up.

By February 12, 2015

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Rare part for groundbreaking 1949 British computer found in US

An original piece of the EDSAC, a precursor to the first business computer, has been sent from Pennsylvania to the UK to take up residence at code-breaking site Bletchley Park.

By February 3, 2015

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Get started with your brand new iOS device

Sparkly new gadgets are abound this holiday season. Instead of sitting alone in fear of messing something up, let us help you get started with that new iPhone or iPad.

By December 26, 2014

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Darwin Awards study says men are far more idiotic than women

Scientists analyze the past 10 years of silly, avoidable deaths and find that almost 90 percent of the "protagonists" in these scenarios were male.

By December 12, 2014