COMPUTER NETWORKING

Detailed explanation-1: -A mobile device is a small computing device, typically small enough to be handheld (and hence also commonly known as a handheld computer or simply handheld), having a display screen with touch input and/or a miniature keyboard.

Detailed explanation-2: -Keep yourself informed, organized, and entertained with a handheld computer, also called a personal digital assistant (PDA). Handhelds are mobile computers that manage your calendar, contact information, and to-do lists.

Detailed explanation-3: -A personal digital assistant (PDA), also known as a handheld PC, is a variety mobile device which functions as a personal information manager. PDAs have been mostly displaced by the widespread adoption of highly capable smartphones, in particular those based on iOS and Android, seeing a rapid decline in use after 2007.

Detailed explanation-4: -A mobile device (or handheld computer) is a computer small enough to hold and operate in the hand.