As long as we have computers, they need input which is manipulated to obtain some output. This transformation principle is not elitist to computers -as such-, because we find this all over in nature. For instance, a prism "manipulates" ordinary light to deliver a spectrum in a form we known as a rainbow. It does so by relatively bending the distinctive frequencies and making clear what is input and what is output. Critics may say that it is just a decomposition of the whole into "things" that were hidden in the whole.
Whatever. With computers the paradigm input - processing - output became clear. And since it has a long standing in physics and cybernetics, the principle is rediscovered in computing when the hardware became programmable by software: the IPO paradigm in the heart of Cybernetics is commonly known as the "Systems Approach".
One may encounter also the equivalent as in input - transformation - output: there is also a feedback component defined, which would either adjust the form, quantity or quality of the inputs needed, either is used to parameterize the Processing. It is not obvious what exactly is the case, but we know about feedback, don't we?