The Input Designation on professional audio gear is often labeled "Receive Input" or "Receive". The Input and Output Mixing bus is usually labeled "Mixing Bus".
"Send" is the terminology used for a mixing board main outputs) or sub-level outputs. The effects bus summing junction is often labeled effects return.
"Send" is the terminology used for a mixing board main outputs) or sub-level outputs. The effects bus summing junction is often labeled effects return.