The modern computer is a product of many technologies, developed in 19th and 20th centuries. Who are the people and companies, who made it possible?
| Computer Keyboard (typewriter) | Electromechanical Relay of Joseph Henry |
| Cathode Ray Tube (CRT) monitor | Vacuum Tube of John Fleming |
| Image Scanner | Audion of Lee De Forest |
| Magnetic Tape of Poulsen & Pfleumer | Magnetic Drum of Gustav Tauschek |
| OCR of Gustav Tauschek | Tabulating machine of Herman Hollerith |
| Printed Circuit Board of Paul Eisler | Trackball of DATAR |
| Transistor | Integrated Circuit of Jack Kilby and Robert Noyce |
| Microprocessor | Hard Disk |
| Mouse of Douglas Engelbart | DRAM memory of Robert Dennard |
| Floppy Disk of Yoshiro Nakamatsu | Laser Printer of Gary Starkweather |
| Compact Disc of James Russell | Touch Screen |
| Modem of Dennis Hayes and Dale Heatherington | Liquid Crystal Display (LCD) |
| USB of Ajay Bhatt |
