IN practice, an electrician sometimes merely requires a circuit diagram of the apparatus or equipment with which he is working. He must therefore use symbols to denote electric bells, dynamos, etc ...

NEMA, the National Electrical Manufacturers Association, Rosslyn, Va., recently released ICS 19-2002, Industrial Controls and Systems: Diagrams, Device ...

Further, while process flow diagrams (PFDs) are well understood by that name, piping and instrument diagrams (P&IDs) may exist under various other names or variations, such as mechanical flow diagrams ...

Scientists have developed a method for tracing the flow of information across synapses, called TRACT (Transneuronal Control of Transcription).