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...coordinates of a [[Spherical coordinates#Spherical coordinates|spherical coordinate system]] which is aligned with the spin axis of [[Earth]]. ...ntal plane]] of the geographic coordinate system. All spherical coordinate systems define such a fundamental plane.

...,<ref>[http://www.colorado.edu/geography/gcraft/notes/datum/gif/llhxyz.gif Coordinate Conversion]</ref><ref>"λ = Longitude east of Greenwich (for longitude west ...ention that East is positive is consistent with a right-handed [[Cartesian coordinate system]] with the North Pole up.

The I/O systems are the means by which the computer receives information from the outside w ...guage]];<ref name="WindowsXP-size">Tanenbaum, Andrew S. ''Modern Operating Systems'' (2nd ed.). Prentice Hall. ISBN 0-13-092641-8.</ref> there are many projec