Installing the operating system on a computer before loading any application packages is an example of:

Finish-To-Start (FS)

Explanation:

Operating system: The term "operating system" is also denoted as OS, and is described as an interface that exists between computer hardware and a computer user. An operating system is considered as a specific software which is responsible for performing all the basic tasks, for example, memory management, controlling peripheral devices, file management, handling output and input, etc.

Finish-to-start is described as a specific type of relationship in which the "predecessor activity" requires to finish in order to the "successor activity" to begin.

In the question above, the given statement is an example of "Finish-To-Start".