This document contains descriptions of various characteristics measured in bipolar junction transistors (BJTs). It lists reverse early voltage characteristic, reverse DC beta characteristic, forward early voltage characteristic, hFE-Ic characteristic, Vce(sat)-Ic characteristic, Vbe(sat)-Ic characteristic, Vce vs. Cobo characteristic, C-B capacitance characteristic, and E-B capacitance characteristic as key measurements made on BJTs to understand their electrical behavior.