Need version 5 browsers with good XML support to properly implement front end
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We draw three tier as minimum architecture but as previous diagram suggests, one is likely to build a more structured system with middle tier having more layers
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Network computer breaks client tier into two with simple HTML at user and Java servlets providing heavier weight capability on a different machine
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Here user is at a WebTV or Palm Pilot or similar low-end device
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"As long as you use XML" can support UNIX, PC or Palmtop clients with same system and web pages
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