SLALIB
SLALIB -- the name just stands for Subprogram Library, --
a collection of subprograms designed for use in certain types
of astronomical application software. Although previous versions were in
ForTran only, the current version contains both C and Fortran libraries.
Most of the routines are concerned with astronomical position and time, but a
number have wider trigonometrical, numerical or general applications,
and one or two are essentially miscellaneous.