SQL
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Ted Codd in the early 1970s. This version, initially called "SEQUEL" ("Structured English Query Language"), was designed to manipulate and retrieve data stored in IBM's original quasi-relational database management system, System R, which a group at IBM San Jose Research Laboratory had developed during the 1970s.
IBM Informix C-ISAM
C-ISAM was first created by Informix Corporation in the 1980s. It provided the underlying file storage mechanism for the popular first generation Informix RDBMS (Relational Database Management System), which allows data manipulation by way of the SQL (Structured Query Language) protocol. This version later became known as the Standard Engine (SE), to distinguish it from Informix's later database engine which used RSAM. Informix initially called this the "Turbo" engine, but that name was later abandoned in favour of the name "OnLine".