The location is in the help, and then find GettingStarted, which includes Multisim and Ultiboard. Multisim is a Windows-based simulation tool introduced by National Instruments (NI) Co., Ltd., which is suitable for the design of board-level analog/digital circuit boards. Including the graphic input of circuit schematic diagram and the input mode of circuit hardware description language, it has rich simulation and analysis ability. Engineers can use Multisim to interactively build the circuit schematic diagram and simulate the circuit. Multisim refines the complex content of SPICE simulation, which enables engineers to quickly capture, simulate and analyze new designs without understanding the in-depth SPICE technology, which also makes it more suitable for electronic education. Through Multisim and virtual instrument technology, PCB design engineers and electronic educators can complete a complete integrated design process from theory to schematic capture and simulation to prototype design and testing.