1. An intermediate storage device that accommodates differences between the rate at which information is fed into a computer and the rate at which the computer can receive the information, or which performs the same function for information output by a computer or between component parts of a computer. 2. An isolating circuit to prevent a reaction of the circuit that is driven from affecting the circuit that is doing the driving. A buffer amplifier may follow a critical stage to isolate subsequent stages from load impedance variations. 3. A solution that minimizes the changes in hydrogen-ion concentration that would otherwise result from a chemical reaction.