  We present a complete library of synthetic spectra based on Kurucz's codes
that covers the 2500-10500 Ang wavelength range at resolving powers 20,000,
11,500 (GAIA), 8500 (RAVE), 2000 (SLOAN) and uniform dispersions of 1 and 10
Ang/pix. The library maps the whole HR diagram, exploring 51,288 combinations
of atmospheric parameters spanning the ranges: 3500 <= Teff <= 47500 K, 0.0 <=
log g <= 5.0, -2.5 <= [M/H] <= 0.5, [alpha/Fe] = 0.0,+0.4, xi =1,2,4 km/sec, 0
<= Vrot <= 500 km/sec. The spectra are available both as absolute fluxes as
well as continuum normalized. Performance tests and foreseen spectroscopic
applications of the library are discussed, including automatic classification
of data from surveys like RAVE, SLOAN, GAIA. The entire library of synthetic
spectra is accessible via http://archives.pd.astro.it/2500-10500/ or (for the 1
AA/pix version only)
http://gaia.esa.int/spectralib/spectralib1A/SpectraLib1a.cfm
