What Does LISP Stand for AutoCAD?

What Does LISP Stand for AutoCAD?

AutoCAD is a widely used computer-aided design (CAD) software that allows users to create 2D and 3D designs. One of the most powerful features of AutoCAD is its ability to automate repetitive tasks using the LISP programming language.

The Origins of LISP

LISP, which stands for LISt Processing, was developed in the late 1950s by John McCarthy. It was one of the first high-level programming languages and was designed to manipulate symbolic expressions and perform complex computations. LISP’s simplicity and flexibility quickly made it popular among AI researchers and programmers.


In the context of AutoCAD, LISP is an interpreted programming language that allows users to extend the functionality of the software by creating custom commands and routines. Its integration with AutoCAD’s core functionality makes it a powerful tool for automating repetitive tasks, improving workflow efficiency, and enhancing productivity.

Advantages of Using LISP in AutoCAD

There are several advantages to using LISP in AutoCAD:

  • Simplicity: LISP’s syntax is simple and easy to understand, making it accessible even for beginners.
  • Flexibility: LISP provides a wide range of built-in functions and libraries, allowing users to create complex programs tailored to their specific needs.
  • Automation: With LISP, you can automate repetitive tasks, such as drawing objects or modifying existing ones, saving valuable time and effort.
  • Customization: By creating custom commands with LISP, you can personalize AutoCAD to match your unique workflow and preferences.

Getting Started with LISP in AutoCAD

If you’re new to LISP programming in AutoCAD, here’s a step-by-step guide to help you get started:

  1. Enable LISP: Open the Options dialog box in AutoCAD, go to the Files tab, and check the “LISP Files” option. This enables AutoCAD to recognize LISP files.
  2. Create a New LISP File: Open a text editor and create a new file with a .lsp extension (e.g., myscript.lsp).
  3. Write Your LISP Code: Start by defining your custom command using the (defun) function.

    Then, write the code that specifies what the command should do.

  4. Load and Run Your LISP File: In AutoCAD, use the “Appload” command to load your LISP file. Once loaded, you can run your custom command by typing its name at the command prompt.

With these simple steps, you can begin exploring the vast possibilities of using LISP in AutoCAD. Whether it’s automating repetitive tasks or creating complex programs, LISP empowers users to take their designs to the next level.

In Summary

LISP stands for LISt Processing and is an interpreted programming language used in AutoCAD for automating tasks and extending the software’s functionality. With its simplicity, flexibility, and customization options, LISP allows users to enhance their productivity and efficiency in creating designs within AutoCAD.