CIDER is a mixed-level circuit and device simulator. CIDER attempts to provide greater simulation accuracy than a stand-alone circuit or device simulator can provide. CIDER is based on the sequential mixed-level circuit and device simulator, CODECS. In common with CODECS, CIDER embeds the circuit simulator, SPICE3, which provides circuit simulation capabilities, analytical models for semiconductor devices, and an interactive user interface. An interface to the captive device simulator, DSIM, provides accurate, one- and two-dimensional numerical models based on the solution of Poisson's equation, and the electron and hole current-continuity equations. The input format of CIDER couples SPICE-like circuit descriptions to a device description format similar to the one used by the PISCES device simulator developed at Stanford University. As a result, CIDER should seem reasonably familiar to designers already accustomed to both these tools. From the Cider help file. SPICE is a general-purpose circuit simulation program for nonlinear DC, nonlinear transient, and linear AC analyses. Circuits may contain resistors, capacitors, inductors, mutual inductors, independent voltage and current sources, four types of dependent sources, lossless and lossy transmission lines (two separate implementations), switches, uniform distributed RC lines, and the five most common semiconductor devices: diodes, BJTs, JFETs, MESFETs, and MOSFETs. From the SPICE3 Version3f3 User's Manual. This is availble as a postscript document from: ftp://ic.eecs.berkeley.edu/pub/Spice3/um.3f3.ps or you can read the online documentation on the homepage.