Final answer:
The single word describing the computer's ability to continuously work is 'performance'. Diminishing marginal productivity occurs when additional workers use the same fixed capital, like multiple typists sharing one computer. Technological advancement and engineers' contributions are evidenced by the increase in computing capabilities, as described by Moore's Law.
Step-by-step explanation:
The single word that describes the repeatedly working capacity of a computer is performance. This term refers to how well a computer can execute tasks over a period of time without degradation of its capabilities. Performance in computing can be affected by several factors including the type of processor, amount of RAM, and storage system. In the context of productivity, when capital is fixed and additional workers are introduced, the concept of diminishing marginal productivity comes into play, as seen with the addition of typists to a single PC setup.
Furthermore, the continued improvement of computing technology such as the transition from manual to electric typewriters, and then to personal computers with word processing software, showcases the increase in individual worker productivity with advanced tools. The development of more powerful computers that can design and manufacture subsequent generations contributes to a positive feedback loop in technology. Lastly, Moore's Law explains the exponential growth in computing capabilities, emphasizing the pivotal role that engineers have had in the evolution of the computer from the early Apple II to today's sophisticated devices.