英文關鍵字
abstract
accounting
accuracy
binary
business
chronometer
clock
code
computer
countdown
counter
data
date
deadline
design
digits
display
electricity
electronic
electrons
financial
hour
industrial
information
instrument
interval
lcd
led
machine
math
matrix
minutes
neon
nixie
numbers
numerals
precision
retro
science
technology
ticker
time
urgent
work