Booting is a startup sequence that starts the operating system of acomputer when it is turned on. A boot sequence is the initial set of operations that the computer performs when it is switched on. Everycomputer has a boot sequence.
When you use your mouse for word processing, you will find that it sometimes changes shape. Please look at the example on the right. By default there is a white arrow that points to the left or right. This enables selection of command options.
A user interface, also called a "UI" or simply an "interface," is the means in which a person controls a software application or hardware device. A good user interface provides a "user-friendly" experience, allowing the user to interact with the software or hardware in a natural and intuitive way.
The Handle System is a technology specification for assigning, managing, and resolving persistent identifiers for digital objects and other resources on the Internet. The protocols specified enable a distributed computer system to store identifiers (names, or handles) of digital resources and resolve those handles into the information necessary to locate, access, and otherwise make use of the resources. That information can be changed as needed to reflect the current state and/or location of the identified resource without changing the handle.