The invention provides a method for producing a supply of a heated fluid, which method comprises passing the fluid through a heat exchanger unit where it is heated by a heat source; characterized in that the heat source derives heat from the exothermic reaction of two or more chemical reactants. The current art requires powering off the computer when entering into hibernation, and only allows a user to store a single non-reusable hibernation file for use in restoring operation when the computer is subsequently powered on. Each coprocessor instruction has a virtual coprocessor number associated therewith for use in identifying which of the plurality of coprocessors is to execute that coprocessor instruction. Then, the radial load or the an axial load is calculated based on the ratio \u201cnca+ncbni\u201d or \u201cca\u2212nibni\u201d. This method includes selecting a portion of code in the previously linked file, removing the portion of code from the previously linked file, and constructing a dynamically linked library file containing the portion of the code, the dynamically linked library file being available to plural files including the previously linked file.