Android OS is a Linux-based open source platform for mobile cellular handsets developed by Google and the Open Handset Alliance. (Continued....)
Handspring was a company that manufactured portable computer/organizer hardware.
Palm is the trade name for a popular personal digital assistant (PDA), a form of handheld device that is also known as a palmtop computer.
Palm OS is the computer operating system that provides a software platform for the Palm series of handheld personal digital assistants (PDAs) made by Palm Inc.