Transcript Windows before Win2000

Before Win2K
BICS 565
DOS
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IBM’s need for a Disk Operating System
Microsoft’s answer - MS DOS
License issue
Dominance of a non-GUI stand-alone OS in
the PC market.
Upsetting changes
• Two upsetting events changed things:
– A mouse-based GUI
– A networked environment
• LAN
• WAN
• Microsoft forced to rethink its strategy with
DOS.
Windows
• A mouse-based GUI on top of DOS
– Not an OS
– A GUI based Environment
• Windows 3.0, 3.1
– Public acceptance to 3.1
• Issue with a LAN based environment
– Windows for Workgroups
• NetBEUI
New Technology
• Windows NT
• Unix-like + Windows GUI
• 3.51 is the incarnation that people
remember.
A better integration
• Windows 9x series
– 32 bit (hybrid)
– Stronger API
• Windows = Kernel + User + API
– Weak, leaking kernel
– Good GUI
– Good API support
NT 4.0
• An “enterprise ready” network OS
– “Ready” is not the same as “Enabled”
• Network OS + some plug-n-play
• Better than NT 3.51
• Works well with Win9x and Win NT
workstation.