This 3-sentence presentation summarizes the stability of systems based on the location of poles in the s-plane. It introduces 3 types of systems: stable systems have poles on the left side of the s-plane, marginally stable systems have poles on the imaginary axis that are non-repetitive, and unstable systems have poles on the right side of the s-plane. The presentation was submitted by Md. Sabbir Rohman of the Department of Electrical and Electronic Engineering at Green University for the lecturer Ashraf Siddiquee.