Throughout the text, the terms server and client may have a
context-related meaning. According to [1], when dealing with the software
context, "the client instantiates
the user interface of an application that resides on a local or remote server".
In contrast, when dealing with the hardware context, the server is the computer
which handles the physical connection to the sensors, and the client is the
computer that instantiates the connection to the server, possibly being the same
server computer. To avoid confusion, we will quote in lowercase the
software server and client applications, whereas we will quote in uppercase the hardware
SERVER and CLIENT computers.