機器
20th century
background
calculate
coil
computation
computer
computer engineering
computer numerical control
control
count
engineer
equipment
factory
fragment
gray
holes
logarithmic
narrow
old
outdated
paper
pen
perforated
piece
program
programming
progress
punched tape
retro
ruler
science
scientist
scrap
shadow
spectacles
stationery
strip
surface
tape
technical
wooden