The use of atomic weapons at the end of World War 2 fostered fears about their potential use during the Cold War years.
Interrupts and signals are low-level mechanisms that can alter the flow of control in a way similar to a subroutine, but usually occur as a response to some external stimulus or event (that can occur asynchronously), rather than execution of an 'in-line' control flow statement.
Control Plan. Introduction. The control plan is the centralized document to keep track of the status of all significant process characteristics. An example follows, along with a description of each of the columns (which can be modified to fit your needs).