|Chordophones / Hornbostel Sachs No#:|
Simple Chordophones / Zithers 
Main article: List of musical instruments by Hornbostel-Sachs number: 31
Instruments which are in essence simply a string or strings and a string bearer. These instruments may have a resonator box, but removing it should not render the instrument unplayable (although it may result in quite a different sound being produced). They include the piano therefore, as well as other kinds of zithers such as the koto, and musical bows.
Bar or Stick Zithers 
The string bearer is bar shaped.
- 311.1 Musical bows – The string bearer is flexible (and curved).
- 311.11 Idiochord musical bows – The string is cut from the bark of the cane, remaining attached at each end.
- 311.12 Heterochord musical bows – The string is of separate material from the bearer.
- 311.111 Mono-idiochord musical bows – Containing one string only
311.112 Poly-idiochord musical bows or harp-bows – Containing several strings that pass over some type of bridge.
311.121 Mono-heterochord musical bows – The bow has one heterochord string only.
311.121.1 Without resonator.
311.121.2 With resonator.
311.121.11 Without tuning noose.
311.121.12 With tuning noose.
311.121.21 With independent resonator.
311.121.22 With resonator attached.
311.121.221 Without tuning noose.
311.121.222 With tuning noose.
311.122 Poly-heterochord musical bows – The bow has several heterochord strings.
311.122.1 Without tuning noose.
311.122.2 With tuning noose.
311.2 Stick zithers – With rigid string carrier
311.21 Musical bow/stick – The string carrier has one rigid and one flexible end.
311.22 True stick zithers – NB Round sticks which happen to be hollow by chance do not belong on this account to the tube zithers, but are round-bar zithers; however, instruments in which a tubular cavity is employed as a true resonator, like the modern Mexican harpa, are tube zithers.
311.221 With one resonator gourd.
311.222 With several resonator gourds.
Tube zithers  The string bearer is a vaulted surface.
312.1 Whole tube zithers – The string carrier is a complete tube
312.11 Idiochord tube zithers.
312.12 Heterochord tube zithers.
312.121 Without extra resonator.
312.122 With extra resonator.
312.2 Half-tube zithers – The strings are stretched along the convex surface of a gutter.
312.21 Idiochord half-tube zithers.
312.22 Heterochord half-tube zithers.
Raft zithers  The string bearer is composed of canes tied together in the manner of a raft
313.1 Idiochord raft zithers.
313.2 Heterochord raft zithers.
Board zithers  The string bearer is a board
314.1 True board zithers.
314.11 Without resonator.
314.12 With resonator.
314.121 With resonator bowl.
314.122 With resonator box – the piano is part of this subdivision.
314.2 Board zither variations.
314.21 Ground zithers.
314.22 Harp zithers.
Trough zithers  The strings are stretched across the mouth of a trough
315.1 Without resonator.
315.2 With resonator.
Frame zithers  The strings are stretched across an open frame
316.1 Without resonator.
316.2 With resonator.
Composite chordophones  Main article: List of musical instruments by Hornbostel-Sachs number: 32 Acoustic and electro-acoustic instruments which have a resonator as an integral part of the instrument, and solid-body electric chordophones. The resonators and string bearers of these instruments are physically united, and they cannot be separated without destroying the instrument. This includes most western string instruments, including lutes such as violins and guitars, and harps.
The plane of the strings runs parallel with the resonator’s surface.
321.1 Bow lutes – Each string has its own flexible carrier.
321.2 Yoke lutes or lyres – The strings are attached to a yoke which lies in the same plane as the sound-table and consists of two arms and a cross-bar.
321.21 Bowl lyres.
321.22 Box lyres.
321.3 Handle lutes – The string bearer is a plain handle.
321.31 Spike lutes.
321.311 Spike bow lutes.
321.312 Spike box lutes.
321.313 Spike tube lutes.
321.32 Necked lutes
321.321 Necked bowl lutes
Đàn tỳ bà
321.322 Necked box lutes –
Acoustic bass guitar
Extended-range classical guitar
Steel-string acoustic guitar
Harps  The plane of the strings lies perpendicular to the resonator’s surface .
322.1 Open harps – The harp has no pillar.
322.11 Arched harps.
322.12 Angular harps.
322.2 Frame harps – The harp has a pillar
322.21 Without tuning mechanism.
322.211 Diatonic frame harps.
322.212 Chromatic frame harps.
322.212.1 With all strings in one plane.
322.212.2 With strings in two planes crossing each other.
322.22 With tuning action.
322.221 With manual tuning action.
322.222 With pedal action.
Harp lutes  The plane of the strings lies at right angles to the sound-table; a line joining the lower ends of the strings would be perpendicular to the neck. Notched bridge.
Unclassified chordophones  These instruments may be classified with a suffix, based on how the strings are caused to vibrate.
4: Hammers or beaters
5: Bare hands and fingers
71: Using a bow
72: Using a wheel
73: Using a ribbon
9: Using a mechanical drive