MILESTONES IN THE HISTORY OF COMPUTER.

·         1822 -                                                                    Difference Engine

·         1837-                                                                     Analyticall Engine

·         First programmable computer-                                The Z1

·         The first electric programmable computer-              Colossus

·         The first digital computer-                                        ENIAC

·         The first stored program computer-                         EDSAC

·         The first computer company-                                   Electronic Controls Company

·         First stored program computer-                              UNIVAC 1101 or ERA 1101

·         First commercial computer-                                    Z4

·         The first PC (IBM compatible) computer-             Acorn

·         The first computer with RAM-                              Whirlwind machine

·         The first transistor computer-                                TX-O

·         The first minicomputer-                                         PDP-1.

·         The first mass-market PC-                                    HP 9100A

·         The first workstation-                                           Xerox Alto

·         The first microprocessor-                                     Intel 4004

·         The first personal computer-                                Kenback-1

·         The first laptop or portable computer-                  IBM 5100

·         The first Apple computer-                                    Apple I

·         The first PC clone-                                              Compaq Portable

·         The first multimedia computer-                            M2500 XL/2 and M4020 SX computers