A shell variable is a variable that is available only to the current shell. In contrast, an environment variable is available system wide and can be used by other applications on the system.A shell is the operating system's command interpreter. It processes the commands entered on the command line or read from a shell script file.
A smartwatch is a wearable computing device marketed as more than a cell phone. With a glance, it gives atomic clock accuracy and allows you to read your text messages in a device that is always at hand.
A smartwatch is also known as a smart wristwatch.
A smartwatch includes a variety of features, such as a watch, cell phone, calculator, camera, GPS navigation, SD card, touchscreen and rechargeable battery.
The technology behind the smartwatch, developed by Microsoft, is known as Smart Personal Object Technology (SPOT) in an attempt to personalize everyday devices.
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