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A set of macros for drawing high-quality electric circuits
containing fundamental elements, amplifiers, transistors, and
basic logic gates to include in TeX, LaTeX, or similar
documents. Some tools and examples for other types of diagrams
are also included. The macros evaluate to drawing commands in
the pic language, which is very easy to understand and which has
a good power/complexity ratio. Pic contains elements of a
simple programming language, and is well-suited to line drawings
requiring parametric or conditional components, fine tuning,
significant geometric calculations or repetition, or that are
naturally block structured or tree structured. The m4 and pic
processors are readily available for Unix and PC machines.
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