| Various | PE Information | Bar Code / QR |
| Tree Swing | CA-PE | HI-PE License Main | Barcode Identification |
| Cost of War in Iraq | CA-PE | HI-PE Renewal | Bar Code Types |
| Circle Calculator | WA PE | WA SAW | Online Bar Code Printer |
| US Patent Office Website | NCEES Website | QR Code Generator |
| Metric Mind Electric Car Components | PPI (MERM / PE) | QR Code Stuff |
| WE PE Application | RCW | WAC | ||
| Welding | California BPESLG (PE address change) | Ergonomics |
| Miller - Weld Symbols | CDC - Anthropometric Data, 2015-2018 | |
| Weld Symbols Explained | HVAC | NHANES Data |
| Weld Symbols (BS EN 22553) | Relative Humidity Calculator | CAESAR | Report | Tool Kit | Data |
| Relative Humidity Equations | International Ergonomics Association | |
| ANSUR II | ||
| Encyclopaedia of Occupational H&S | ||
| WPS - Welding Procedure Specification | Joint Type Designators |
| CJP - Complete Joint Penetration | B - Butt |
| PJP - Partial Joint Penetration | C - Corner |
| Welding processes | T - T-joint |
| SMAW - shielded metal arc welding | L - Lap |
| GMAW - gas metal arc welding | E - Edge |
| FCAW - flux cored metal arc welding | BC - Butt or Corner Joint |
| SAW - submerged arc welding | TC - T- or Corner Joint |
| Welding positions | BTC - Butt, T-, or Corner Joint |
| F - Flat | |
| H - Horizontal | Symbols for base metal thickness and penetration |
| V - Vertical | P - PJP |
| OH - overhead | L - limited thickness–CJP |
| U - unlimited thickness–CJP |