Automated personal video recording, including selecting a lender from among one or more lenders, in which the selecting is carried out in dependence upon a deficit amount, the lenders include at least one user having free storage space and at least one pool having free storage space. The system comprises one or more programs containing a set of instructions that generate a calculated property, state, position or image of the fluid flowing into or through each cavity, the one or more programs using one or more variable inputs that are representative of one or more selected properties, characteristics or operating parameters of the machine or the fluid. This invention provides a non-corrosive, eco-friendly process, where the catalyst can be reused for many times.