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the mouse
2-dimensional display editing
in-file object addressing and linking
hypermedia
outline processing
flexible view control
multiple windows
cross-file editing
integrated hypermedia email
hypermedia publishing
document version control
shared-screen teleconferencing
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computer-aided meetings
formatting directives
context-sensitive help
distributed client-server architecture
uniform command syntax
universal "user-interface" front end module
multi-tool education
grammer-driven command language interpreter
protocols for virtual terminals
remote procedure call protocols
compileable "Command Meta Language"
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