The most likely meaning of the acronym MMS is Multimedia Messaging Service. This telecommunications tech term is related to the acronym SMS, which stands for Short Message Service.
While the SMS function is limited to short messages consisting of text characters, MMS allows users to transmit multimedia content via smart phones and most cell phones. Alternative meanings for the acronym MMS include Minerals Management Service, Minimum Mean Square, Mission Modular Spacecraft and Modular Multiband Scanner. These acronyms pertain to fields ranging from astronomy to chemistry. However, with the advent of mobile and wireless communications, tech acronyms have become increasingly ubiquitous.