Slide rule
Calculator
Napier’s Bone
Difference Engine
Permanent
Primary
Physical
Secondary
Light pen
Keyboard
Monitor
Mouse
access time
read time
response time
cycle time
Modifying
Rectifying
Bugging
Debugging
Ink Jet
Line
Laser
Thermal
4
8
16
32
Icon
Cursor
Debug
Bug
Project developer
Software engineer
Computer scientist
Programmer
Reliable
Reasonable
Cheap
Expensive