input and output circuits with isolated common point
51Two-port network — A Two Port Network (or four terminal network or quadripole) is an electrical circuit or device with two pairs of terminals (i.e., the circuit connects two dipoles). Two terminals constitute a port if they satisfy the essential requirement known… …
52Electrical substation — An electrical substation is a subsidiary station of an electricity generation, transmission and distribution system where voltage is transformed from high to low or the reverse using transformers. Electric power may flow through several… …
53Virtual machine — A virtual machine (VM) is a completely isolated guest operating system installation within a normal host operating system .[1] Modern virtual machines are implemented with either software emulation or hardware virtualization or (in the most… …
54Reading (computer) — For other uses, see Reading (disambiguation). Reading is an action performed by computers, to acquire data from a source and place it into their volatile memory for processing. For example, a computer may read information off a floppy disk and… …
