Difference between win 98 and win xp 
1. windows 98 supports FAT16,32 and 
         windows xp supports fat 16,32 and ntfs . 
2.using fat 32 we can create partition 128 GB but we can 
not give security to file and folder like we can not 
implement disk quta (disk quta is used to limit space in 
hard disk for a particular user ).
          but windows xp support ntfs .here we can give 
more security to file and folder . using ntfs we can 
encrypt ,decrypt, compress, decompress in windows xp. 
3.windows 98 supports networking. it can serve as server 
and workstation but there is a problem in 98 networking .we 
can not give security permission to resources. using 
windows 98 networking we can share resources and we have to 
go for peer to peer networking (in peer to peer networking 
we can share resources but we can not give security. we can 
connect 10 -15 node ).
          but xp supports server side networking we can 
give security in xp .there is separate version for server 
and client. 
4.windows 98 is slower than windows xp but windows 98 is 
easy to use .
          windows xp have much complexity to use it . 
5.Both 98 and xp support internet 
            but for net purpose windows xp is excellent. 
6.window 98 is cheaper than windows xp. 
7.xp color management is good than windows 98.xp supports 
256 bit true color. 
8.For home uses windows 98 is better than windows xp.
           xp better supports game than windows 98. 
9.windows 98 can support as server as well as 
   client                         
         but in windows xp we have separate version for 
client and server. 
10.windows 98 we have to install every device (like 
mouse,keybord,sound card) 
        but windows xp it will be installed automatically. 
it supports plug and play device

window98 doesn't support user account& doesn't support usb 
device.it doesn't have extra security features.it doesn't 
support multiprocessing

the only difference is in the performance
the increasing order is

win98>2000>xp

diffrence bet 98 and 2000 is 1902

Hi,
Win98 is based on FAT System where as 2000 and XP are NTFS 
based Systems.

securities/ incription is the main concern of XP over 98.