Final answer:
The correct sequence of components in the functional model of an information system is input, processing, output, users.
Step-by-step explanation:
The correct sequence of components in the functional model of an information system is input, processing, output, users.
In this model, input refers to the data or information that is entered into the system. Processing involves manipulating or transforming the input data to produce the desired output. Output is the result or outcome of the processing, which can be presented to the users of the system. Finally, the users are the individuals or entities who interact with the system and utilize the output.
For example, consider a word processing software. The user inputs text and commands through the keyboard (input), the software processes the input to format and edit the text (processing), and finally, the formatted document is displayed on the screen (output) for the user to view and edit further.