Simulator Directives
(a.k.a. Dot Commands)

Whereas the circuit element topology is typically schematically drafted, these commands are usually placed on the schematic as text specified to be SPICE directives. All such commands start with a period and are therefore called "dot commands".

.AC -- Small Signal Analysis

.BACKANNO -- Translate Port Current Names

.DC -- Source Sweep Analysis

.END -- End of Netlist

.ENDS -- End of Subcircuit Definition

.FOUR -- Compute a Fourier Component

.FUNC -- User Defined Function

.FERRET -- Download a File from URL

.GLOBAL -- Declare Global Node

.IC -- Set Initial Condition

.INCLUDE -- Include a File

.LIB -- Include a Library

.LOADBIAS -- Load a Bias Point

.MEASURE -- Waveform Measurement

.MODEL -- Define a SPICE Model

.NET -- Compute Network Parameters

.NODESET -- Supply Hints for the .OP

.NOISE -- Noise Analysis

.OP -- Bias Point

.OPTIONS -- Simulator Options

.PARAM -- User-Defined Parameters

.SAVE -- Limit Saved Data

.SAVEBIAS -- Save Bias Point

.STEP -- Parameter Sweeps

.SUBCKT -- Define a Subcircuit

.TEMP -- Temperature Sweeps

.TF -- DC Small Signal Transfer Function

.TRAN -- Nonlinear Transient Analysis

.WAVE -- Create a .Wav File