Abstract
We start with the basic ideas of "numbers" and "counting" and how the concepts and requirements differ with different levels of technical and administrative sophistication. This is followed by a brief summary of the development of calculating devices, to the structure of the "von Neumann" computer. Finally, we introduce the requirements of a computer, the importance of memory and an overview of data storage within that memory.
Keywords: Concept of "number", development of calculation, Babbage analytical engine, Babbage Difference Engine, Colossus, ENIAC, von Neumann, underlying technology, data in memory.