機器
agitator
alphabet
annotation
announcement
appeal
assist
business
classic
communication
education
equipment
focus
human rights
important
important notice
information
instigator
journalist
keyboard
knowledge is power
letter
manual
mechanical
memo
message
nostalgia
note
office
old
paper
positive
print
proclaim
remark
retro
show
sign
symbol
technology
typing machine
visible
writer
writing