OS History – Windows NT/2000/XP
• Key designer – David Cutler also designed
VAX/VMS
• 1988, v1 - Win32 API – “microkernel”
• 1990, v3.1- Server and Workstation versions
• 1996, v4
– Win95 interface
– Graphics to kernel
– More NT licenses sold than all Unix combined
– Microkernel de-emphasized