Coining of 'Object-Relational Impedance Mismatch'

Ted C. Neward formally coined the term 'object-relational impedance mismatch' in his writings, crystallizing the widespread frustration among developers trying to integrate OOP with RDBMS.

Significance

This term gave a name to a pervasive problem, providing a common vocabulary and driving the search for solutions, which ultimately led to the widespread adoption and development of ORMs.