Deficiencies of TANGO 1

• No flexible security and authentication

• Incomplete support for firewall operation

• Awkward GUI (“alien interface”)

• No runtime server switching

• No support for user’s identity (Cybercrowd)

• No support for “roles”

• No real support for communities

• Rudimentary support for asynchronous collaboration

  • No persistent document storage
  • No mail gateway

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