Labels:awning | book | cabinet | daily | plaything | sconce | shelf | sky OCR: THE COMPUTER INDUSTRY HISTORY, CAREERS AND ETHICS 4 9 3 Early proprietary operating systems developed by IBM and other computer manufacturers were designed to work only on a particular computer model. Each of these operating systems had unique set of commands to call its routines. Early operating systems were step in the right direction, but unfortunately, learning to use each one was like learning new and unique programming language It was not until the third generation of computers that portable operating systems such as CP/M and UNIX, provided pro- grammers with similar operating system commands across hardware platforms In addition to operating systems second -generation computers also ran programming language compilers that allowed programmers to write instructions using English-like ...
