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Text editor
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Programming tool
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Email client
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All of the above features
vi
kword
Text editor
Programming tool
Email client
All of the above features
Use F4 key
ESC-: i
ESC-: q
ESC-: x
ESC-: q!
ESC-wq
ESC-w!
ESC-!
Ls command
Ps command
Command cs
Ds command
PID
PUID
PGUID
GUID