After the 165 was discontinued on July 18, 1994, its entry level descendant, the PowerBook 150, would continue to be sold until October 14, 1995, and though it used the 140 case design, its internals were actually based on the PowerBook Duo and PowerBook 190, a 100-series PowerBook in name only as it used the PowerBook 5300's motherboard and case as well.
After the 165 ceased production on July 18, 1994, Apple would continue to sell its lower-end model, the PowerBook 150, until October 14, 1995. Although it looked similar to the 140 model in terms of design, the 150 actually used components from the PowerBook Duo and PowerBook 190.