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VSI may stand for: Vertical shaft impactor, a type of impact crusher; Vertical speed indicator, an instrument in an aircraft monitoring rate of descent or climb; Very Short Introductions, a series of books published by Oxford University Press; Virtual Switching Instance, in VPLS
In aviation, a variometer – also known as a rate of climb and descent indicator (RCDI), rate-of-climb indicator, vertical speed indicator (VSI), or vertical velocity indicator (VVI) – is one of the flight instruments in an aircraft used to inform the pilot of the rate of descent or climb. [1]
The Vitamin Shoppe logo from 2001-2013. The Vitamin Shoppe's retail stores and online sites carry a line of nutritional supplements [16] with supplementary lines, such as FitFactor, NatureFuel, ProBio Care, plnt and the Bodytech brand of sports supplements. [17]