In this talk, a general overview of the Advanced Light Source (ALS) will be presented. The ALS is a third generation light source optimized for soft x-ray/ VUV science. Beamline 10.0.1 of the ALS is a good example of a VUV/EUV beamline. A detailed description of this beamline will be presented. This high resolution beamline splits in three branches serving two very different communities. One branch is dedicated to photoemission studies of highly correlated materials (solid state physics) and the other two branches are dedicated to photoionization/photoexcitation studies of atomos, molecules and clusters in gas phase. Recent research highlights conducted in all three branches will be presented in a second talk.