The term "byte" was introduced by IBM at the launch of the IBM System/360 in 1964. [1], which event also introduced the term "throughput". IBM never used it officially in reference to their 36-bit machines. By 1969, IBM had discontinued selling their 36-bit machines. UNIVAC and DEC held onto 36 bits for several more decades, though.
[1] https://www.ibm.com/history/system-360