Hi; For any who might be interested in the question I posed a few minutes ago, I have made some adjustments to quoted paragraph. It now reads: "A digital computer is an appliance that takes in information meaningful to humans; converts it into electrical data; stores it; may or may not transform the data; and presents it as information to humans. Electrical data consists of a set, or continuous stream, of lower or higher voltage pulses or bits. Data is transformed by transistors switching electrical data from one circuit to another. The possible transformations are: changing a higher voltage bit to a lower voltage and vice versa; arithmetic addition of two sets of data bits; and, moving data from one meaningful location to another meaningful location within the computer." Regards Bill