What victorian invention is not used today?

A single keystroke or command or a series of keystrokes or commands used to automatically issue a longer predetermined series of keystrokes or commands is called a what? Is PVC degradable? In three phase voltage calculation why we multiply line voltage by square root 3 not by 3? What function is used to release the memory on heap? What kind of Pipe for closed loop heat pump? What are the disadvantages of a brushless generator? Why did transistors eventually replace valves in radios? Why is a parallel circuit better than series? It is a testing process to obtain confirmation by the client or customer of the application under test that the system meets mutually agreed-upon requirements and often occurs before a client or custo? What do you mean by Instantiating the function template? What is the difference between a pipeline and a flowline? What component is used to change alternating current to direct current? What is artificial compound stone? What is standard power factor value? Why is the grounding conductor flat? Why should expansion loops be incorporated into a system? How do you upload on virtual university webpage? What part of a wheelbarrow is a simple machine? How much of aggregate do you need to make concrete? How the DC generator are classified according to field excitation?