Musical instruments refer to tools or devices that are used to create musical sounds. Musical instruments are made up of materials such as wood, metal, string, and nondurable materials. Some of the most commonly used musical instruments are guitar, piano, wind instruments, keyboard, and percussion.

Freeze drying is a process that involves the removal of water or other solvents from a frozen product by a phenomenon called sublimation, which occurs when a frozen liquid undergoes a phase change directly to the gaseous phase without passing through the liquid phase. On the contrary, drying at ambient temperatures from the liquid phase generally results in changes in the product, which may suit only certain materials. However, in freeze drying, the material does not go through the liquid phase, and this allows the preparation of a stable product that is easy to use and aesthetic in appearance.

Combined cycle gas turbine (CCGT) is a power generation technology that incorporates a gas turbine in conjunction with a steam turbine. A steam turbine is used to supplement the electricity generated from a gas turbine, which is driven by the steam generated from waste heat recovered from the gas turbine exhaust.

Sapphire is a versatile material that is used in LEDs and consumer electronics. It is used in a wide range of end markets due to attributes such as durability, light transmission, chemical inertness, thermal insulation, hardness, and resistance to physical damage and chemical erosion.

Diagnostic wearable medical devices, used for monitoring, controlling, and tracking an individual's vital signs at regular intervals, have gained momentum in the past few years. These devices measure physiological information through remote or wireless communication and transmit this information to medical professionals or the user. These autonomous, non-invasive devices help assess specific medical functions such as body temperature, blood pressure, glucose quantity, respiratory rate, heart rate, and blood oxygen saturation.

There are several types of vibrators with different applications. The adult vibrator market in the US was not only the largest market for adult vibrators in the Americas, but also one of the largest markets for adult vibrators in the world. The market has experienced rapid growth during 2012-2015 and will continue this growth trend through the forecast period. The market will grow at a CAGR of 12.01% in 2015-2020.

Optical data connections are used mostly in long-haul communications and in large server farms. Due to their ability to transfer massive amounts of data at the fastest rate possible, these connections make up the backbone of communications infrastructure. Most of the interconnect technologies use electrical signals sent along copper wire to transfer data between the high-speed fiber optic connections and the users. Copper is also used inside computers as a core interconnect technology. However, copper has reached its peak performance and the only solution to transfer higher volumes of data using electrical signals is to have more connections. This limitation of copper poses a major threat to the future of microprocessor manufacturers.

GaAs, which is also known as a compound III-V semiconductor, is used in devices such as infrared LED, monolithic microwave ICs (MMICs), microwave frequency ICs, solar cells, optical windows, and laser diodes. It is increasingly used as a replacement for silicon wafers due to its electronic properties. GaAs has high saturated electron velocity and electron mobility, which allow GaAs devices to function efficiently at frequencies above 250 GHz. Due to the wider band gap, GaAs wafers are less sensitive to heat and emit less noise, especially at higher frequencies, compared to silicon wafers. Due to these properties, they are used in mobile devices, wireless communications, aerospace and defense, and automotive systems.

E2W (electric two-wheeler) is a term used for electric motorcycles, scooters, and bicycles. They are powered by batteries instead of liquid fuel. E2Ws are equipped with a DC motor, controller, battery, and charger, instead of an ICE (internal combustion engine), as used in liquid fuel-powered two wheelers. E2Ws are considered more environment-friendly, as well as a fuel saving alternative in comparison with liquid fuel- powered two-wheelers. They are a sound choice for short-range travel requirements. In the E2W segment, E-scooters are growing in the market.

Carbon brakes were originally used in military aircraft applications due to their low weight and high energy absorption capability. These were made widely available for commercial and civil aircraft in 1980. Historically, the cost association of carbon brakes was much higher than the conventional steel brakes, and their use was restricted to only large long-haul commercial aircraft.