| Friden EC-130 | |
| US Patent 3430095 | Display subsystem developed by SRI for the EC-130 |
| US Patent 3523282 | Patent for Ragans original drum based EC-130 prototype |
| US Patent 3546676 | Patent for the EC-130 4-counter machine as put into production |
| US Patent 3778778 | Further patent on EC-130 architecture |
| EC-130 "Computer Printout" | An original document containing a structured complete logical and circuit description of the 4-counter EC-130.Unfortunately, the logical structure is obscure and this puzzle is still to be decoded. |
| EC-130 Power Supply | Reverse engineered circuit of the EC-130 power supply |
| CRT Datasheet | Manufacturer's data sheet for the 5DEP1 CRT used in the EC-130 |
| Friden Advertisement | Advertisement from 1964, just after the introduction of the EC-130 |