Most common camshaft used in today's car engines is DOHC (Dual Over Head Camshaft). Most of the manufacturers in the world are using this cam shaft in their
cars, as it is most practical and has a four stroke cycle and gives more breathing space
to the engine.
DRAM
ATX, Actually todays most common motherboard form factor used is MicroATX
Borescopes are instruments used to inspect visually area which can not be accessed by other means. They are commonly used to visually inspect aircraft engines, steam turbines, diesel engines, etc
Steam generators are being used in many coal plants. There it is used to fuel the engines that process newly found coal so that it may be refined and used.
I believe steam engines are still widely used in China
I am assuming you are referring to port valves. Exhaust and intake valves are the most common names.
Common Rail is a form of fuel injection used with gasoline and diesel engines
Avgas is a common name for fuel used by internal combustion engines in aircraft, while jet fuel is used in jet engines.
The most used Japanese engines are those in cars and motorbikes. Therefore a make such as Honda would be the most popular because they have been making them for years.
Google and yahoo are the most commonly used.
Most engines are made of cast iron, some are aluminum alloys those are pretty much the primary materials used for engines. presently engines are designing with plastic. These engines are used in racing and high end cars.
Tecumseh made most, Briggs and Straton engines were used, but not many.