# \#autocad-development-system

**URL:** https://scanalyst.fourmilab.ch/tag/autocad-development-system/882.md

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## [From the Fourmilab Vault—1990: “ClassWar”, Object Oriented Extensible Database for AutoCAD](https://scanalyst.fourmilab.ch/t/from-the-fourmilab-vault-1990-classwar-object-oriented-extensible-database-for-autocad/647)

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**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Replies:** 1\
**Last updated:** [30 December 2021 00:23 UTC](https://scanalyst.fourmilab.ch/t/from-the-fourmilab-vault-1990-classwar-object-oriented-extensible-database-for-autocad/647 "2021-12-30T00:23:44Z")

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Developed in 1990 as a demonstration of the AutoCAD Development System (ADS) then being readied for shipment with the upcoming AutoCAD Release 11, ClassWar used ADS and the ATLAST embedded language toolkit to implement a…