The FidoCadJ format is a way to store technical drawings and electronic circuits in a very compact text, easy to embed in an Usenet, forum messages and web pages. FidoReadJS is a reader written in JavaScript able to convert on the fly these drawings and show them on your web site.
More info:
FidoCadJ: http://darwinne.github.io/FidoCadJ/
https://github.com/DarwinNE/FidoCadJ
Similar projects:
FidoReadPHP: https://sourceforge.net/projects/fidoreadphp/
(Work in progress)