English for Masters. Маркушевская Л.П - 164 стр.

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and, in essence, relegates the iPad to nothing more than a digital reader with Internet
and multimedia capabilities. That being said, it still can be used for note taking and
some productivity thanks to Apple’s decision to make the iWork productivity suite of
Keynote, Pages and Numbers available for the device for an extra cost. Still, you
can’t run Microsoft World (although you can open and read World documents), nor
can you run advanced programs such as Photoshop and InDesign like you’d run on
your PC.
Like every other portable device in Apple’s line, you can’t replace the iPad’s
battery. Should you get to the end of the iPad battery’s lifespan, which Apple
estimates is around five years, you would send your device to Apple for a
replacement at a cost of $99. that may not be so bad, considering batteries are usually
expensive for portable devices and five years is much longer than you’d get out of
many batteries in other devices.
What is Virtualization?
Virtualization is a proven software technology that is rapidly transforming the IT
landscape and fundamentally changing the way that people compute. Today’s
powerful x86 computer hardware was designed to run a single operating system and a
single application. This leaves most machines vastly underutilized. Virtualization lets
you run multiple virtual machines on a single physical machine, sharing the resources
of that single computer across multiple environments. Different virtual machines can
run different operating systems and multiple applications on the same physical
computer. While others are leaping aboard the virtualization bandwagon now,
VMware is the market leader in virtualization. The technology is production-proven,
used by more than 170,000 customers.
Virtualization was first developed in the 1960s to partition large, mainframe
hardware for better hardware utilization. Today, computers based on x86 architecture
are faced with the same problems of rigidity and underutilization that mainframes
faced in the 1960s. VMware invented virtualization for the x86 platform in the 1990s
to address underutilization and other issues, overcoming many challenges in the
process. Today, VMware is the global leader in x86 Virtualization.
Introduction to How Stealth Bombers Work
The B-2 bomber, commonly known as the stealth bomber, was an ambitious
project, to say the least. In the 1970s, the US military wanted a replacement for the
aging B-52 bomber. They needed a plane that could carry nuclear bombs across the
globe, to the Soviet Union, in only a few hours. And they wanted it to be nearly
invisible to enemy sensors.
As you might expect, hiding a giant plane is no easy task. Northrop Grumman, the
defense firm that won the bomber contract, spent billions of dollars and nearly 10
years developing the top secret project. The finished product is a revolutionary
machine - a 172-foot wide flying wings that looks like an insect to radar scanners!
The craft is also revolutionary from an aeronautics perspective: It doesn’t have any of
the standard stabilizing systems you find on a conventional airplane, but pilots say it
flies as smoothly as fighter jet.