KLOE has measured most decay branching ratios of K-S, K-L and K-+/--mesons. It has also measured the K-L and the K-+/- lifetime and determined the shape of the form factors involved in kaon semileptonic decays. We present in the following a description of the above measurements and a well organized compendium of all of our data, with particular attention to correlations. These data provide the basis for the determination of the CKM parameter vertical bar V-us vertical bar and a test of the unitarity of the quark flavor mixing matrix. We also test lepton universality and place bounds on new physics using measurements of vertical bar V-us vertical bar from K-l2 and K-l3 decays. RI Gauzzi, Paolo/D-2615-2009; valente, paolo/A-6640-2010; ANTONELLI, ANTONELLA/C-6238-2011; Fiore, Salvatore/C-9722-2011; Di Domenico, Antonio/G-6301-2011; De Lucia, Erika/D-2250-2011; branchini, paolo/A-4857-2011; Murtas, Fabrizio/B-5729-2012