Hi Peter
SAO = Smithsonian Astrophysical Observatory Star Catalog.
The SAO catalogue includes 258,996 stars, including B1950 positions, proper motions, magnitudes, and, usually, spectral types in a locally-developed binary format. While the SAO catalog is more or less complete to V=9, with 4,503 stars fainter than V=10, the PPM catalog is fairly complete to V=9.5, with 102,672 stars fainter than V=10 and 22,395 stars fainter than V=11.
Here is a link.
https://heasarc.gsfc.nasa.gov/W3Brow...talog/sao.html
The other catalogues you listed are for deep sky objects such as galaxies, etc.
Cheers
Dennis