A system and method for assembling and disassembling a personal computer or components within a personal computer is disclosed. An example of a method is a method comprising: providing a self-degrading cement composition that comprises a degradable material, an acid source, a base source, and a water source; placing the self-degrading cement composition in a desired location in a well bore that penetrates a subterranean formation; and allowing the self-degrading cement composition to set to form a hardened kickoff plug. In one of many possible embodiments, an inventory mapping method involves assigning fixture codes to inventory fixtures.