third generation: 1963-present; the invention of integrated circuit brought us the generation of computers. with this invention computers became smaller,more powerful moree reliable and they are able to run many different programs at the same time. in 1980 microsoft disk operating system (MS-Dos) was born and in 1981 IBM introduced the personal computer (PC) for home and office use. three years later apple gave us the macintosh computer with its icon interface and the 90's gave us windows operating system.