# PolyTech Forum > PolyTechForum.com website provides free, on-the-go reading and posting access to many engineering Usenet discussion groups, completely anonymously and without requiring registration ## Discussion groups - [⧑ Industrial Control Group](https://www.polytechforum.com/control/): Industrial Control engineering and scientific discussions - [⋐⋒⋐ Computer Numeric Control](https://www.polytechforum.com/cnc/): All aspects of Computer Numeric Control - machinery as well as software - [⏚ Electrical Engineering](https://www.polytechforum.com/electrical/): Electrical Engineering discussions - [⏚ Electrical Engineering (French)](https://www.polytechforum.com/electrotechnique/): - Electrical engineering discussions in French. - [⏚ Electrical Engineering (German)](https://www.polytechforum.com/elektrotechnik/): - Electrical engineering discussions in German - [⏣ General Metalworking](https://www.polytechforum.com/metalworking/): All aspects of working with metal. - [⏣ Metalworking Craft](https://www.polytechforum.com/craft-metalworking/): -metalworking craft discussions - [⚃ Lego Mindstorms Discussions](https://www.polytechforum.com/mindstorms/): Lego Mindstorms Disucssions - [⚃ Using Lego and compatible building blocks](https://www.polytechforum.com/lego/): Discussion of Lego, Duplo (and compatible) toys. - [⚒ Blacksmithing - wrought iron and steel discussions](https://www.polytechforum.com/blacksmithing/): - Discussions about wrought iron and steel techniques - [⚗ Material Sciences ](https://www.polytechforum.com/materials/): - mateirals science discussions - [⚙ General Engineering Forum (German)](https://www.polytechforum.com/engineering-de/): - General engineering discussions in German. - [⚙ Mechanical Engineering](https://www.polytechforum.com/mech/): - Mechanical Engineering discussions - [⚙ Model Engineering in the UK](https://www.polytechforum.com/modelengineering/): Model engineering, metal crafts in UK - [⚙ Stationary Engines - UK](https://www.polytechforum.com/uk-engines/): - Discussions about stationary engines and generators. Topics related mostly to UK. - [⚡ Welding Forums](https://www.polytechforum.com/welding/): Welding of materials for manufacture & repair. - [✈ RC aircraft models](https://www.polytechforum.com/air/): - Discussions about RC airplanes and other flying model objects - [AutoCAD discussions](https://www.polytechforum.com/autocad/): - Discussions about AutoCAD® - 3D CAD design, drafting, modeling, architectural drawing, and engineering software. Not affiliated with the software manufacturer. - [Engineering Science (Polish)](https://www.polytechforum.com/engineering-pl/): - Engineering science discussions in Polish. - [General Robotics Forum](https://www.polytechforum.com/robotics/): All aspects of robots and their applications. - [Metallurgy discussions](https://www.polytechforum.com/metallurgy/): - discussions about the properties of metals and alloys. - [Model Railroad Forum](https://www.polytechforum.com/trains/): - Discussions about scale railroad models. All standard scales are represented here. - [Model railroading in the UK](https://www.polytechforum.com/uk-trains/): - Discussions about railroad modeling, mostly related to UK topics. All standard scales are covered here. - [Model rockets forum](https://www.polytechforum.com/rockets/): - Discussions about model rocketry - [PRO/Engineer (Creo) discussions](https://www.polytechforum.com/pro-engineer/): - discussions about PRO/Engineer® (now Creo Elements®) CAD system. Not affiliated with the software manufacturer. - [RC and scale modeling (French)](https://www.polytechforum.com/moidels-fr/): - RC and scale models, including railroad models (in French) - [RC and scale modeling (German)](https://www.polytechforum.com/models-de/): - RC and scale model discussions in German. - [RC and scale modeling (Italian)](https://www.polytechforum.com/models-it/): - RC and scale models discussions (in Italian) - [RC and scale modeling (Polish)](https://www.polytechforum.com/models-pl/): - RC and scale modeling discussions (in Polish) - [Scale modeling discussions](https://www.polytechforum.com/scale/): - Discussions about techniques, materials, supplies and other aspects of scale modeling. All types and scales of models are covered here. - [Solidworks CAD Design software](https://www.polytechforum.com/solidworks/): - Discussions about Solidworks® CAM software by Dassault Systèmes. Not affiliated with the software manufacturer. - [⚗ Polymers Forum](https://www.polytechforum.com/polymers/): - discussions about the science and properties of polymers (plastics) - [🔒 Lockmithing and Lockpicking Discussions](https://www.polytechforum.com/locksmithing/): Discussions about all matter related to locks and safes ## Machine-readable - [Sitemap index](https://www.polytechforum.com/sitemap.xml) - [Atom feed of latest threads](https://www.polytechforum.com/feed.xml)