The layers of the categorization system are used to categorize the protocols that function on computers and other electronic devices.

It is used for the storing of information for lengthy periods of time, but it is also utilised as an overflow area for the execution of programmes: Hard disc, CD-ROM, CMOS, and ROM are the components in this order.

Block diagram: A Segway16 Personal Transporter (PT) is a two-wheeled vehicle in which the human operator stands vertically on a platform. As the driver leans left, right, forward, or backward, a set of sensitive gyroscopic sensors sense the desired input. These signals are fed to a computer that amplifies them and commands motors to propel the vehicle in the desired direction. One very important feature of the PT is its safety: The system will maintain its vertical position within a specified angle despite road disturbances, such as uphills and downhills or even if the operator over-leans in any direction. Draw a functional block diagram of the PT system that keeps the system in a vertical position. Indicate the input and output signals, intermediate signals, and main subsystems. (http://segway.com)

The steps that would be taken to send a message in a safe way are shown.