SIMPLE MACHINE |
Lever . Wheel and axle . Pulley . Inclined plane . Wedge . Screw |
ELECTRICAL OR MECHANICAL ARTIFACTS |
weapon or harming tool . furniture . cleaner . writer or writing/drawing tool . viewer or viewing instrument . Vehicle . carriage . utensil or storage tool . throwing tools . security device . Protecting tool . holder . converters . Elevator and depressor . recorder or recording tool . calculator or computer |
BUSINESS ARTIFACTS |
NATIONAL ARTIFACTS |
MACHINE ELEMENTS |
|
ELECTRICAL ELEMENTS |
XX |