Business laptops

Lenovo ThinkPad S230u-33474HU Twist 

SPECS

Processor

Processor type Intel Core i5-3317U

Processor speed 1700.0 MHz

Display

Display size 12.5 inches

Display type Glossy LCD with LED Backlight

Touchscreen Yes

Resolution 1366 x 768 pixels

Graphics

Graphics Type Integrated

Primary Graphics Chipset Intel HD Graphics 4000

Ports and Connections

Available Interfaces

Bluetooth

Mini DisplayPort

Mini HDMI

USB 3.0

Memory

Memory size 4.0 MB

Memory type DDR3

Memory speed 1600.0 MHz

Dimensions

Width 12.3 inches

Depth 9.3 inches

Height 0.9 inches

Weight 3.4 pounds

Weight with Accessories 4.1 pounds

Battery

Battery Life 3:15   (hh:mm)

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Dell Latitude 6430u

SPECS

Processor

Processor type Intel Core i5-3427U

Processor speed 1.8 MHz

Requirements

Operating System Compatibility

Microsoft Windows 7 Professional

Microsoft Windows 7 Ultimate

Microsoft Windows 8

Display

Display size 14.0 inches

Display type Matte LCD with LED Backlight

Touchscreen No

Aspect ratio 16:9

Resolution 1366 x 768 pixels

Graphics

Graphics Type Integrated

Primary Graphics Chipset Intel HD Graphics 4000

Storage

Drives included 1.0

Drive size 128.0 GB

Drive type Solid-State Drive

Ports and Connections

Available Interfaces

USB 3.0

VGA

Wireless connection

802.11n

Bluetooth

Memory

Memory size 8192.0 MB

Memory type DDR3

Memory speed 1600.0 MHz

Memory max 16.0 GB

Dimensions

Width 13.3 inches

Depth 8.9 inches

Height 0.8 inches

Weight 4.0 pounds

Weight with Accessories 4.6 pounds

Sound

Speakers Stereo

Battery

Battery Life 6:18   (hh:mm)

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HP Elitebook Folio

SPECS
Processor
Processor type Intel Core i5-3427U
Processor speed 1800.0 MHz

Display
Display size 14.0 inches
Display type Matte LCD with LED Backlight
Touchscreen No
Aspect ratio 16:9
Resolution 1366 x 768 pixels

Graphics
Graphics Type Integrated
Primary Graphics Chipset Intel HD Graphics 4000

Storage
Drives included 1.0
Drive size 180.0 GB
Drive type Solid-State Drive

Available Interfaces
Bluetooth
DisplayPort
Docking Station / Port Replicator
USB 3.0
VGA
Wireless connection 802.11 n

Memory
Memory size 4.0 MB

Memory type DDR3
Memory speed 1600.0 MHz
Memory max 16.0 GB

Dimensions
Width 13.3 inches
Depth 9.1 inches
Height 0.8 inches
Weight 3.7 pounds
Weight with Accessories 4.4 pounds

Sound
Speakers Stereo
Storage Media
SD card Yes
Included Software
Operating System Microsoft Windows 8 Pro

Other Features
Devices
Built-In Microphone
Built-In Webcam
Fingerprint Reader
Input devices

Battery
Battery Life 6:19   (hh:mm)

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Toshiba Satellite P845T-S4310 

SPECS
Processor
Processor type Intel Core i5-3317U
Processor speed 1700.0 MHz

Display
Display size 14.0 inches
Display type Glossy LCD with LED Backlight
Touchscreen Yes
Resolution 1366 x 768 pixels


Graphics
Graphics Type Integrated
Primary Graphics Chipset Intel HD Graphic 4000

Storage
Drives included 1.0
Raid type none
Drive size 750.0 GB
Hard Drive Speed 5400.0 RPM
Drive type Hard Disk Drive

Available Interfaces
HDMI
USB 3.0
VGA
Wireless connection 802.11 n

Memory
Memory size 6144.0 MB
Memory type DDR3
Memory speed 1600.0 MHz
Memory max 16.0 GB

Dimensions
Width 13.7 inches
Depth 9.2 inches
Height 1.2 inches
Weight 4.8 pounds
Weight with Accessories 5.3 pounds
Optical Drive
Included Drives DVD Drive

Sound
Speakers Stereo
Included Software
Operating System Microsoft Windows 8

Other Features
Devices
Built-In Microphone
Built-In Webcam
Input devices Touchpad (multitouch)

Battery
Battery Life 4:22   (hh:mm)

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Java virtual machine

A Java Virtual Machine (JVM) is a process virtual machine that can execute Java bytecode. It is the code execution component of the Java platform. Sun Microsystems has stated that there are over 5.5 billion JVM-enabled devices
       .A Java virtual machine (JVM) interprets compiled Java binary code (called bytecode) for a computer's processor (or "hardware platform") so that it can perform a Java program's instructions.

          In high-level programming languages such as C and C++, we write a program in a human-readable format, and a program called a compiler translates it to a binary format called executable code that the computer can understand and execute. The executable code depends upon the computer machine that we use to execute our program; it is machine dependent. In Java, this process of writing to executing a program is very similar, but with one important difference that allows us to write Java programs that are machine independent.

Using an interpreter, all Java programs are compiled to an intermediate level called byte code. We can run the compiled byte code on any computer with the Java runtime environment installed on it. The runtime environment consists of a virtual machine and its supporting code.

     The Java Virtual Machine is responsible for interpreting Java byte code and translating this into actions or Operating System calls. For example, a request to establish a socket connection to a remote machine will involve an Operating System call. Different Operating Systems handle sockets in different ways - but the programmer doesn't need to worry about such details. It is the responsibility of the JVM to handle these translations so that the Operating System and the CPU architecture on which the Java software is running is completely irrelevant to the developer.

-by SDR

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