The second form of software component is the linkable component. Instead, the linkable component must be included during compilation. In essence, a linkable component is an independent subsystem that your program may use at will by incorporating calls to the component in the source code of your program. It does not contain its own power supply, for example. It is, however, a large unit of well-defined, modular functionality.
Complexity is the single greatest challenge faced by programmers.
Beginners learn early in their programming careers that the longer the program, the longer the debugging time. As program size grows, so usually does its complexity, and there is a limit to the amount of complexity we, as humans, can manage. From a purely combinatoric standpoint, the more individual lines of code there are, the greater the chance for side effects and unwanted interactions. As most programmers today know, programs are growing exceedingly complex. By compartmentalizing large blocks of functionality into independent resources, the programmer can reduce the apparent complexity of a program.