In order to conserve memory, transients were small modules that supported a specific task, and were swapped in and out of memory. The concept of transient area is part of Mythical Man-Month's discussion on design and the use of main memory.
In order to conserve memory, transients were small modules that performed a specific duty, and were swapped in and out of memory. The notion of a transient zone is discussed in Mythical Man-Month regarding design and the use of primary memory.