Various types of guitars
Two most often seen guitars are acoustic and electric.
-Acoustic guitars
Acoustic guitar is made of hollow wooden body, a neck with frets on it and a headstock. Its strings are most often made of steel, because they give “sharper”, louder sound than nylon ones. Acoustic guitar is not dependent on an external device to be heard. It’s quieter than other instruments commonly found in bands, so it’s often externally amplified. There are several notable subcategories within the acoustic guitar group: classical and flamenco guitars; steel string guitars, which include the flat top or "folk" guitar; twelve string guitars and the arch top guitar. The acoustic guitar group also includes unamplified guitars designed to play in different registers such as the acoustic bass guitar which has a similar tuning to that of the electric bass guitar.
1.
1. Headstock
2. Nut
3. Machine heads (or pegheads, tuning keys, tuning machines, tuners)
4. Frets
5. Truss rod
6. Inlays
7. Neck
8. Heel (acoustic or Spanish) - Neckjoint (electric)
9. Body
14. Back
15. Soundboard (top)
16. Body sides (ribs)
17. Sound hole, with Rosette inlay
18. Strings
19. Saddle
20. Fretboard (or Fingerboard)
1. Headstock
The headstock is at the end of the guitar neck. It's furthest from the body. It is fitted with machine heads that adjust the tension of the strings, which makes tone different (tuning). Classic tuner layout is "3+3" in which each side of the headstock has three tuners. In this layout, the headstocks are commonly symmetrical. Many guitars feature other layouts, including six-in-line (Fender Stratocasters) tuners or even "4+2". However, some guitars do not have headstocks at all, in which case the tuning machines are located somewhere else, either on the body or the bridge.
2. Nut
The nut is a small piece of bone, plastic, graphite, stainless steel, or other medium-hard material, at the place where the headstock meets the fretboard. Its grooves guide the strings onto the fretboard, giving consistent lateral string placement. It is one of the endpoints of the strings' vibrating length. It must be accurately cut, or it can contribute to tuning problems due to string slippage, and/or string buzz.
4. Frets
Frets are metal strips embedded along the fretboard and located at exact points that divide the scale length in accordance with a specific math formula. Pressing a string against a fret determines the strings' vibrating length and therefore its resultant pitch. The pitch of each consecutive fret is defined at a half-step interval on the chromatic scale. Frets worn down from heavy use can be replaced or, to a certain extent, re-shaped as required. Frets are available in different gauges. Every twelve frets represents one octave. In practise, luthiers determine fret positions using the constant 17.817, which is derived from the twelfth root of two. The scale length divided by this value yields the distance from the nut to the first fret. That distance is subtracted from the scale length and the result is divided in two sections by the constant to yield the distance from the first fret to the second fret. Positions for the remainder of the frets are calculated in like manner.
5. Truss rod
The truss rod is a metal rod that runs along the inside of the neck. It is used to correct changes to the neck's curvature caused by the neck timbers aging, changes in humidity or to compensate for changes in the tension of strings. Turning the truss rod clockwise will tighten it, counteracting the tension of the strings and straightening the neck or creating a backward bow. Turning the truss rod counter-clockwise will loosen it, allowing string tension to act on the neck and creating a forward bow. Adjusting the truss rod affects the intonation of a guitar as well as the height of the strings from the fingerboard, called the action. Classical guitars do not require truss rods as their nylon strings exert a lower tensile force with lesser potential to cause structural problems.
6. Inlays
Inlays are visual elements set into the exterior surface of a guitar. They are used to mark various frets on guitar, so the player could more easily find it. Usually, inlays start on third fret and from there every second fret is marked. So, it would go this way: 3, 5, 7, 9... Inlays are usually placed on the fretboard and on the side of the neck, so that only the player could see them.
In addition to fretboard inlay, the headstock and soundhole surround are also frequently inlaid. The manufacturer's logo or a small design is often inlaid into the headstock. Rosette designs vary from simple concentric circles to delicate fretwork mimicing the historic rosette of lutes. Bindings that edge the finger and sound boards are sometimes inlaid.
8. Neck joint or 'Heel'
This is the point at which the neck is either bolted or glued to the body of the guitar. Almost all acoustic guitars, with the primary exception of Taylors, have glued (otherwise known as set) necks, while electric guitars are constructed using both types.
7. Neck
A guitar's frets, fretboard, tuners, headstock, and truss rod, all attached to a long wooden piece, collectively constitute its neck. The wood used to make the fretboard will usually differ from the wood in the rest of the neck. The bending stress on the neck is considerable, particularly when heavier gauge strings are used, and the ability of the neck to resist bending is important to the guitar's ability to hold a constant pitch during tuning or when strings are fretted. The rigidity of the neck with respect to the body of the guitar is one determinant of a good instrument versus a poor one. There are many different types of neck profiles available, giving the guitarist many options. Some aspects to consider in a guitar neck may be the overall width of the fingerboard, scale (distance between the frets), the neck wood, the type of neck construction (for example, the neck may be glued in or bolted on), and the shape (profile) of the back of the neck. Other type of material used to make guitar necks are graphite, aluminium, or carbon fiber.
9. Body (acoustic guitar)
In acoustic guitars, string vibration is transmitted through the bridge and saddle to the body via sound board. The sound board is typically made of tone woods such as spruce or cedar. Timbers for tone woods are chosen for both strength and ability to transfer mechanical energy from the strings to the air within the guitar body. Sound which is further shaped by the characteristics of the guitar body's resonant cavity.
In an acoustic instrument, the body of the guitar is a major determinant of the overall sound quality. The guitar top, or soundboard, is a finely crafted and engineered element made of tonewoods such as spruce and red cedar. This thin piece of wood, often only 2 or 3mm thick, is strengthened by differing types of internal bracing. The top is considered by many luthiers to be the dominant factor in determining the sound quality. The majority of the instrument's sound is heard through the vibration of the guitar top as the energy of the vibrating strings is transferred to it. The body of an acoustic guitar has a sound hole through which sound is projected. The sound hole is usually a round hole in the top of the guitar under the strings. Air inside the body vibrates as the guitar top and body is vibrated by the strings, and the response of the air cavity at different frequencies is characterized, like the rest of the guitar body, by a number of resonance modes at which it responds more strongly.
-Electric guitarsElectric guitar is most popular in rock and metal, but it's used in almost all music genres today. It cannot work without amplifier.
Electromagnetic pickups convert the vibration of the steel strings into electrical signals which are fed to an amplifier through a cable or radio transmitter. The sound is frequently modified by other electronic devices or the natural distortion of valves (vacuum tubes) in the amplifier. There are two main types of pickup: single coil and double coil (known as humbuckers), each of which can be passive or active. The electric guitar is used extensively in jazz, blues and rock and roll, and was commercialized by Gibson together with Les Paul and independently by Leo Fender of Fender Music. The lower fretboard action (the height of the strings from the fingerboard) and its electrical amplification lend the electric guitar to some techniques which are less frequently used on acoustic guitars. These techniques include tapping, extensive use of legato through pull-offs and hammer-ons (also known as slurs), pinch harmonics, volume swells and use of a tremolo arm or effects pedals.
1. Headstock
2. Nut

3. Machine heads (or pegheads, tuning keys, tuning machines, tuners)
4. Frets
5. Truss rod
6. Inlays
7. Neck
8. Heel (acoustic or Spanish) - Neckjoint (electric)
9. Body
10. Pickups
11. Electronics
12. Bridge
13. Pickguard
Now, most parts on electric and acoustic guitars are the same, so here are described only parts that are different on electric guitars, or missing on acoustic guitars
9. Body (electric guitar)
Most electric guitar bodies are made of wood and include a plastic pick guard. Boards wide enough to use as a solid body are very expensive due to the worldwide depletion of hardwood stock since the 70's, so the wood is rarely one solid piece. Most bodies are made of two pieces of wood with some of them including a seam running down the center line of the body. The most common woods used for electric guitar body construction include maple, basswood, ash, poplar, alder, and mahogany. The body is usually carved or routed to accept the other elements, such as the bridge, pickup, neck, and other electronic components. Other alternative materials to wood, are used in guitar body construction. Some of these include carbon composites, plastic material and aluminium alloys.
10. Pickups Pickups are transducers attached to a guitar that detect (or "pick up") string vibrations and convert the mechanical energy of the string into electrical energy. The resultant electrical signal can then be electronically amplified. The most common type of pickup is electromagnetic in design. These contain magnets that are tightly wrapped in a coil, or coils, of copper wire. Such pickups are usually placed right underneath the guitar strings. The vibration of the strings causes a small voltage to be created in the coils surrounding the magnets, this signal voltage is later amplified. Traditional electromagnetic pickups are either single-coil or double-coil. Single coil pickups are susceptable to noise induced from electric fields, usually mains-frequency (60 or 50 hertz) hum. The introduction of the double-coil humbucker in the mid 50's did away with this problem through the use of two coils, one of which is wired in a reverse polarity orientation.
The type and model of pickups used can greatly affect the tone of the guitar. Typically, humbuckers, which are two magnet/coil assemblies attached to each other are traditionally associated a heavier sound. Single coil pickups, one magnet wrapped in copper wire, are used by guitarists seeking a brighter, twangier sound with greater dynamic range.
11. Electronics
On guitars that have them, these components and the wires that connect them allow the player to control some aspects of the sound like volume or tone. In many cases the electronics have some sort of shielding to prevent pickup of external interference and noise.
12. Bridge
Bridge
The main purpose of the bridge on an acoustic guitar is to transfer the vibration from the strings to the soundboard, which vibrates the air inside of the guitar, thereby amplifying the sound produced by the strings.
On both electric and acoustic guitars, the bridge holds the strings in place on the body. There are many varied bridge designs. There may be some mechanism for raising or lowering the bridge to adjust the distance between the strings and the fretboard (action), and/or fine-tuning the intonation of the instrument.
13. Pickguard A.k.a. a scratchplate. This is a piece of laminated plastic or other material that protects the finish of the top of the guitar from damage due to the use of a plectrum or fingernails. Electric guitars sometimes mount pickups and electronics on the pickguard. It is a common feature on
steel-string acoustic guitars.
-Archtop guitars
Archtop guitars are steel-stringed acoustic or semi-acoustic guitars with a full body and a distinctive arched belly. Their sound is very popular in blues and jazz. Archtop guitars were invented by Orville Gibson, founder of Gibson Guitar Corporation, in 1890s.
The archtops are generally equipped with thicker strings than acoustic guitars. They have rich sound unamplified, but in many cases, they use some kind of amplification. Largest manufacturers of archtops are Gibson and Epiphone.