In mathematics, division by zero is division where the divisor (denominator) is zero.
Flight 15P of SpaceShipOne (X0) was the first privately funded human spaceflight.
Turner syndrome (TS), also known as 45,X or 45,X0, is a condition in which a female is partly or completely missing an X chromosome.
The X0 sex-determination system is a system that determines the sex of offspring among.
X00 was a popular DOS-based FOSSIL driver which was commonly used in the mid-1980s to the late 1990s and is even still used today.
The X1 is a fast, light-weight sailing dinghy designed for sailing on rivers, estuaries and inland waters by Phil Morrison.
Xo or XO may refer to.