Explanation:

The question asks for a device using a "handheld operation system." APDA (Apple Programmers and Developers Association) is an organization, not a device. Personal computers, laptops, and mainframes use desktop or server operating systems, not handheld ones. Handheld operating systems are designed for devices like PDAs, smartphones, or tablets, which are not listed as correct options. Therefore, the question or the marked answer is flawed.