Type of mouse that has a ball located on the bottom that rolls around on a flat surface as the mouse is moved. Sensors inside the mouse determine the direction and distance of the movement - Input. Optical mouse. Type of mouse that uses a laser to detect the mouse's movement and has no moving parts - Input.
The Strategic Defense Initiative (SDI) was a proposed missile defense system intended to protect the United States from attack by ballistic strategic nuclear weapons (Intercontinental ballistic missiles and Submarine-launched ballistic missiles).
PADI Open Water Dive Course (15 years +). The Professional Association of Diving Instructors (PADI) is the worldâs largest recreational diving membership and diver training organization founded in 1966.SDI Junior Open Water Scuba Diver Course (10 â 14 years). SDI Open Water Scuba Diver Course (15 years +).Scuba Diving International (SDI) was created in 1999 and grew out of the success of their sister company TDI, which specializes in the more advanced disciplines of technical dive training.DI Open Water Scuba Diver Course (15 years +). Scuba Diving International (SDI) was created in 1999 and grew out of the success of their sister company TDI, which specializes in the more advanced disciplines of technical dive training.