Articles: a, an, the
"An advanced avionics system improves navigation."
"The new composite winglet reduces drag."
Possessives: my, your, his, her, its, our, their
"Our latest carbon-fiber fuselage is lightweight and durable."
"Its new hydraulic actuator ensures smooth operation."
Demonstratives: this, that, these, those
"This compact cockpit display enhances visibility."
"Those large fuel tanks increase range."