英文關鍵字
app
back
busy
center
computer
control
display
employee
information
interactive
interface
job
lot
male
man
manager
many
map
modern
monitor
monitoring
movement
office
online
operator
phone
plan
rail
railroad
railway
room
schematic
scheme
screen
security
service
showing
sitting
specialist
supervision
system
technology
telecommunication
tracking
train
watching
work
worker
working
workplace