Smartwatch

smart watchsmartwatcheswatch phonesmart watcheswatcheswristwatch computerAbacus PDA WatchSmartwatch global market sharewatchwrist-worn computer
A smartwatch is a wearable computer in the form of a wristwatch; modern smartwatches provide a local touchscreen interface for daily use, while an associated smartphone app provides for management and telemetry (such as long-term biomonitoring).wikipedia
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Peripheral

peripheralsperipheral devicecomputer peripheral
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Digital camera

digital camerasdigitalcamera
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Thermometer

thermometerstemperature sensortemperature
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Accelerometer

accelerometersG-sensoracceleration sensor
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Pedometer

step counternumber of steps takennumber of steps walked
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Altimeter

altimetrybarometric altimeterpressure altimeter
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Compass

magnetic compassDigital compassmariner's compass
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

GPS navigation device

GPSIntegratedGPS receiver
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Computer speakers

speakersspeakercomputer speaker
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Secure Digital

microSDSDmicroSDXC
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Mass storage

mass storage devicemass-storageBacking store
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Computer

computerscomputer systemdigital computer
Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and microSD cards, which are recognized as storage devices by many other kinds of computers.

Web mapping

online mapmappingmapping service
Software may include digital maps, schedulers and personal organizers, calculators, and various kinds of watch faces.

Calendaring software

calendarcalendaringcalendar application
Software may include digital maps, schedulers and personal organizers, calculators, and various kinds of watch faces.

Calculator

pocket calculatorcalculatorselectronic calculator
Software may include digital maps, schedulers and personal organizers, calculators, and various kinds of watch faces.

Clock face

dialfacehour hand
Software may include digital maps, schedulers and personal organizers, calculators, and various kinds of watch faces.

Headset (audio)

headsetheadsetswireless headset
Some smartwatches function as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth headset. The watch may communicate with external devices such as sensors, wireless headsets, or a heads-up display.

Head-up display

HUDheads-up displayheads up display
The watch may communicate with external devices such as sensors, wireless headsets, or a heads-up display.

Wi-Fi

WiFiwireless internetwireless
It may support wireless technologies like Bluetooth, Wi-Fi, and GPS.

Global Positioning System

GPSGlobal Positioning System (GPS)global positioning systems
It may support wireless technologies like Bluetooth, Wi-Fi, and GPS.

Pulsar (watch)

Pulsar
The first digital watch, which debuted in 1972, was the Pulsar manufactured by Hamilton Watch Company.

Hamilton Watch Company

HamiltonBurenHamilton 500
The first digital watch, which debuted in 1972, was the Pulsar manufactured by Hamilton Watch Company.

Seiko

Hattori SeikoHattori Seiko Co.lorus
"Pulsar" became a brand name which would later be acquired by Seiko in 1978. The D409 was the first Seiko model with on-board data entry (via a miniature keyboard) and featured a dot matrix display.

Pulsar

pulsarsradio pulsarradio pulsars
In 1982, a Pulsar watch (NL C01) was released which could store 24 digits, making it most likely the first watch with user-programmable memory, or "memorybank" watch.

Dot matrix

dot-matrixall points addressableAPA
The D409 was the first Seiko model with on-board data entry (via a miniature keyboard) and featured a dot matrix display.