Mobile device

mobile deviceshandheldmobilehandheld devicehandheld computerhandheld devicesmobile platformhandheldshand-heldhandheld computers
A mobile device (or handheld computer) is a computing device small enough to hold and operate in the hand.wikipedia
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Video game

video gamesgamegaming
Integrated cameras, the ability to place and receive voice and video telephone calls, video games, and Global Positioning System (GPS) capabilities are common.
These include dedicated devices such as video game consoles, as well as general-purpose computers like a laptop, desktop or handheld computing devices.

Mobile operating system

mobile platformsmobile OSmobile
Mobile devices may run mobile operating systems that allow third-party apps specialized for said capabilities to be installed and run.
A mobile operating system (or mobile OS) is an operating system for phones, tablets, smartwatches, or other mobile devices.

Mobile app

appmobile applicationapps
Mobile devices may run mobile operating systems that allow third-party apps specialized for said capabilities to be installed and run.
A mobile application, also referred to as a mobile app or simply an app, is a computer program or software application designed to run on a mobile device such as a phone, tablet, or watch.

Tablet computer

tabletstabletTablet PC
Early smartphones were joined in the late 2000s by larger, but otherwise essentially the same, tablets. Phones/tablets and personal digital assistants may provide much of the functionality of a laptop/desktop computer but more conveniently, in addition to exclusive features. Handheld computers are available in a variety of form factors, including smartphones on the low end, handheld PDAs, Ultra-Mobile PCs and Tablet PCs (Palm OS, WebOS).
A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package.

Touchscreen

touch screencapacitive touchscreenscreen
Typically, any handheld computer device will have an LCD or OLED flatscreen interface, providing a touchscreen interface with digital buttons and keyboard or physical buttons along with a physical keyboard.
Those for mobile devices are now being produced with 'in-cell' technology, such as in Samsung's Super AMOLED screens, that eliminates a layer by building the capacitors inside the display itself.

Mobile Internet device

MIDMIDsMobile Internet Devices
Some mobile devices can be used as mobile Internet devices to access the Internet while moving but they do not need to do this and many phone functions or applications are still operational even while disconnected to the Internet.
A mobile Internet device (MID) is a multimedia-capable mobile device providing wireless Internet access.

Internet

onlinethe Internetweb
Some mobile devices can be used as mobile Internet devices to access the Internet while moving but they do not need to do this and many phone functions or applications are still operational even while disconnected to the Internet.
The linking of commercial networks and enterprises by the early 1990s marked the beginning of the transition to the modern Internet, and generated a sustained exponential growth as generations of institutional, personal, and mobile computers were connected to the network.

Smartphone

smartphonessmart phonesmart phones
Early smartphones were joined in the late 2000s by larger, but otherwise essentially the same, tablets. Phones/tablets and personal digital assistants may provide much of the functionality of a laptop/desktop computer but more conveniently, in addition to exclusive features. Handheld computers are available in a variety of form factors, including smartphones on the low end, handheld PDAs, Ultra-Mobile PCs and Tablet PCs (Palm OS, WebOS).
In the early 1990s, IBM engineer Frank Canova realised that chip-and-wireless technology was becoming small enough to use in handheld devices.

Mobile computing

mobilemobile computermobile computers
Hardware includes mobile devices or device components.

Graphing calculator

graphing calculatorsGraphinggraphical calculator
A graphing calculator (also graphics calculator or graphic display calculator) is a handheld computer that is capable of plotting graphs, solving simultaneous equations, and performing other tasks with variables.

Digital camera

digital camerasdigitalcompact digital camera
Most cameras produced today are digital, and while there are still dedicated digital cameras, many more cameras are now being incorporated into mobile devices, portable touchscreen computers, which can, among many other purposes, use their cameras to initiate live video-telephony and directly edit and upload imagery to others.

Personal digital assistant

PDAPDAspersonal digital assistants
Phones/tablets and personal digital assistants may provide much of the functionality of a laptop/desktop computer but more conveniently, in addition to exclusive features. Handheld computers are available in a variety of form factors, including smartphones on the low end, handheld PDAs, Ultra-Mobile PCs and Tablet PCs (Palm OS, WebOS).
A personal digital assistant (PDA), also known as a handheld PC, is a variety mobile device which functions as a personal information manager.

Rugged computer

ruggedizedruggedruggedization
Handheld devices have become ruggedized for use in mobile field management.
However, one research study found that in environments where rugged computers are commonly used, total cost of ownership was 36 percent lower for rugged notebooks and 33 percent less for handhelds and PDAs, compared to conventional non-rugged versions.

Mobile collaboration

In 2009, developments in mobile collaboration systems enabled the use of handheld devices that combine video, audio and on-screen drawing capabilities to enable multi-party conferencing in real-time, independent of location.
Where traditional video conferencing has been limited to boardrooms, offices, and lecture theatres, recent technological advancements have extended the capabilities of video conferencing for use with discreet, hand-held mobile devices, permitting true mobile collaborative possibilities.

Portable communications device

communications deviceportableportable devices
A portable communications device is a hand-held or wearable device.

Smart device

smart devicesconnected devicessmart
Also see smart device.

Calculator

pocket calculatorcalculatorselectronic calculator
At the turn of the millennium, the line between a graphing calculator and a handheld computer was not always clear, as some very advanced calculators such as the TI-89, the Voyage 200 and HP-49G could differentiate and integrate functions, solve differential equations, run word processing and PIM software, and connect by wire or IR to other calculators/computers.

WebOS

Palm webOSHP webOSPalm App Catalog
Handheld computers are available in a variety of form factors, including smartphones on the low end, handheld PDAs, Ultra-Mobile PCs and Tablet PCs (Palm OS, WebOS).

OLED

organic light-emitting diodeP-OLEDOLEDs
Typically, any handheld computer device will have an LCD or OLED flatscreen interface, providing a touchscreen interface with digital buttons and keyboard or physical buttons along with a physical keyboard.

Headset (audio)

headsetheadsetsBluetooth headset
Many such devices can connect to the Internet and interconnect with other devices such as car entertainment systems or headsets via Wi-Fi, Bluetooth, cellular networks or near field communication (NFC).

Wi-Fi

WiFiwireless internetwireless
Many such devices can connect to the Internet and interconnect with other devices such as car entertainment systems or headsets via Wi-Fi, Bluetooth, cellular networks or near field communication (NFC).

Bluetooth

Bluetooth 4.0Bluetooth 5.0Bluetooth 2.0
Many such devices can connect to the Internet and interconnect with other devices such as car entertainment systems or headsets via Wi-Fi, Bluetooth, cellular networks or near field communication (NFC).

Near-field communication

NFCnear field communicationnear-field communications
Many such devices can connect to the Internet and interconnect with other devices such as car entertainment systems or headsets via Wi-Fi, Bluetooth, cellular networks or near field communication (NFC).

Telephone

phonetelephonesLocal Telephone Service
Integrated cameras, the ability to place and receive voice and video telephone calls, video games, and Global Positioning System (GPS) capabilities are common.

Global Positioning System

GPSglobal positioning systemsGlobal Positioning System (GPS)
Integrated cameras, the ability to place and receive voice and video telephone calls, video games, and Global Positioning System (GPS) capabilities are common.