In computer science, a prefix denoting a function coded locally by a programmer, especially for use as an example or a coding exercise.
For example, in the glut library of OpenGL there exists the function
glutSolidCube(<size>)
Which draws a cube with a side length of size. Non-user-defined functions are usually generalized to work in many situations at the cost of overhead testing for those special cases. If a programmer wanted to write their own version of the code, either for practice, or to stream-line the code to their specific purposes, cutting out the overhead, a common notation for this function might be
mySolidCube(<size>)
Computer Science text books are rife with myFunctions.