comptometer
Num Lock
adding machine
contrivance
calculator
electromechanical device
governor
servomechanism
keyer
rotor
keycap
touch-typing
control key
clutchless manual transmission
button
thumbwheel
command key
phase tester
pedal
keypad
minicalculator
Arithmograph
tractor
keypunch
actuator
keystroke
rotary encoder
Atwood machine
push
abacus
programmable logic controller
backspace
rotary switch
pot
mnemometer
push button
stepping switch
grab
energy vampire
positioner
lever
response
electromechanical
two-fingered typing
linkage
joystick
voting machine
perpetual motion machine of the first kind
dual inline package switch
fastener
DIP switch
Silent Sam
clutch
adder
tabulating machine
keyboarding
tabulator
calculating machine
automatic transmission
electronic computer
computing device
bell button
math grenade
touch typing
standard transmission
data processor
Robertson screwdriver
jukebox
musical instrument
computing machine
computer
pepper mill
information processing system
bug
telautograph
scancode
gearknob
rotary converter
tenkey
self-drilling screw
rotary
automaton
tonewheel
relay
tuning peg
synchronous converter
keyset
manipulator