An instrument is a concrete or abstract Tool intended for a purpose other than Mechanical Work , in particular a refined one.
Musical Instrument s are devices designed to produce music, frequently by plucking or striking a string or bell or drum surface, or by forcing air to resonate (see Wind Instrument ).
Scientific instruments are devices intended to assist in the conduct of science. An example would be the test tubes and other glassware one might find in a chemistry or biology laboratory.
Measuring Instrument s are devices used to measure or compare the magnitude of physical properties, such as voltmeters, speedometers, etc.
Analytical Instrument s are devices used to measure multiple or complex material properties, such as mass spectrometers.
Medical Instrument s are devices for the diagnosis and treatment of diseases, such as stethoscopes.
Instruments of Torture is a term for the means whereby some act of torture is accomplished.
Legal Instrument s are documents used to formally document various types of transactions or confirm certain statuses for specific purposes, such as confirming contractual relations, civil status, etc. Examples include wills, writs, court order, contracts, treaties, marriage licenses and driver's licenses.
Financial Instrument s are documents used to formally document various types of financial transactions. Examples include loan agreements, bonds, mortgages, stocks and floating charges.
Negotiable Instrument s are a class of documents evidencing promises or orders to pay a certain sum of money.
