  We present a library of 1654 high-resolution stellar spectra, with a sampling
of 0.3 A and covering the wavelength range from 3000 A ~ to 7000 A The library
was computed with the latest improvements in stellar atmospheres, incorporating
non-LTE line-blanketed models for hot, massive (Teff >= 27500 K) and
line-blanketed models for cool (3000 K =< Teff =< 4500 K) stars. The total
coverage of the grid is 3000 K =< Teff =< 55000 K and -0.5 =< log g =< 5.5, for
four chemical abundance values: twice solar, solar, half solar and 1/10 solar.
Evolutionary synthesis models using this library are presented in a companion
paper. We tested the general behavior of the library by calculating and
comparing equivalent widths of numerous H and HeI lines, and some of the
commonly used metallic indices. We also compared the library with the empirical
libraries STELIB and Indo-US. The full set of the synthetic stellar spectra is
available from our websites (http://www.iaa.csic.es/~rosa and
http://www.astro.iag.usp.br/~lucimara/library.html).
