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+ACS is a general purpose circuit simulator.  It performs nonlinear
+dc and transient analyses, fourier analysis, and ac analysis
+linearized at an operating point.  It is fully interactive and
+command driven.  It can also be run in batch mode or as a server.
+The output is produced as it simulates.  Spice compatible models
+for the MOSFET (level 1,2,3,6) and diode are included in this
+release.
+ 
+Since it is fully interactive, it is possible to make changes and
+re-simulate quickly.  The interactive design makes it well suited
+to the typical iterative design process used it optimizing a circuit
+design.  It is also well suited to undergraduate teaching where
+Spice in batch mode can be quite intimidating.  This version, while
+still officially in beta test, should be stable enough for basic
+undergraduate teaching and courses in MOS design, but not for
+bipolar design.
+ 
+In batch mode it is mostly Spice compatible, so it is often possible
+to use the same file for both ACS and Spice.