I'm looking to install Cumulative Update 4 for SQL 2008 R2 on my dev machine. I've got to the download page but I'm stuck on the file names. I can pick some or all of these files: 1. 2008R2_RTM_SNAC_CU4_2345451_10_50_1746_x64 2. 2008R2_RTM_MDS_CU4_2345451_10_50_1746_x64 3. 2008R2_RTM_SapBI_CU4_2345451_10_50_1746_x64 4. 2008R2_RTM_RSShrPnt_CU4_2345451_10_50_1746_x64 5. SQLServer2008R2_RTM_CU4_2345451_10_50_1746_x64 I can guess some of them (I think): SNAC=native client, MDS=Master Data Services. But what the hell are the rest? There's no explanation on the page but presumably it's explained somewhere. Does anyone know where, please?