This is a set of macros for drawing high-quality line diagrams to include in TeX, LaTeX, or similar documents. The macros were originally developed for electric circuit diagrams containing fundamental elements, amplifiers, transistors, and basic logic gates, but several tools and examples for other types of diagrams are also included. The advantages and disadvantages of such a system are similar to those of TeX itself, which is macro-based, non-wysiwyg, and which uses ordinary character input.

Since the pic language is a full (if simple) programming language, the system allows the creation of repetitive diagrams through loops, parameterization, and accurate placement of text/image/diagram combinations; many examples can be seen at http://www.ece.uwaterloo.ca/~aplevich/Circuit_macros/html/examples.html.