Microsoft Windows - Originally, windows was just a graphical extension for MS-DOS, but then Microsoft Windows NT came out which was heavily based on their copy of the OS/2 code but with a new modular kernel and the Win32 application programming interface, making porting from 16-bit Windows easier. Then, Microsoft Office came out and this bundled separate productivity applications, such as Microsoft Word and Microsoft Excel. Next, Microsoft launched Windows 3.0, featuring streamlined user interface graphics and improved protected mode capability for the Intel 386 processor. Both Office and Windows became dominant in their respective areas.