| 1st Generation Computers | First Generation | Vacuum Tubes |
| 2nd Generation Computers | Second Generation | Transistors |
| 3rd Generation Computers | Third Generation | Integrated Circuits |
| 4th Generation Computers | Fourth Generation | Microprocessors |
| The IAS Computer | Institute for Advanced Studies | |
| The LGP-30 Computer | Librascope General Precision |
| IBM | Mainframe Family tree & chronology | |
| VLSI Microprocessors | Chronology of Events in the History of Microcomputers | Ken Polsson |
| bitsavers | Software/Documentation Archives | |
| Karl Kleine | Historic Documents in Computer Science | |
| Karl Kempf, US Army | Electronic Computers within the Ordnance Corp | |
| Fortune City | Comprehensive Computer List | PCBiography |