10g is Oracle's grid computing product group including (among other things) a database management system (DBMS) and an application server. In addition to supporting grid computing features such as resource sharing and automatic load balancing. (Continued...)
Oracle is one of the largest vendors in the enterprise IT market and the shorthand name of its flagship product, a relational database management system (RDBMS) that's formally called Oracle Database.
Oracle Database In-Memory is an optional add-on to Oracle Database 12c that enables Oracle's flagship relational software to function as an in-memory database.