20th-century inventions

thumb|upright=1.35|Flat-panel display|Flat-screen television receivers on display for sale at a consumer electronics store in May 2008

global system of interlinked hypertext documents accessed via the Internet

thumb|Food in a refrigerator with its door open

thumb|MOSFET|Metal–oxide–semiconductor field-effect transistor (MOSFET), showing gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (white).

data storage device

thumb|An electronic pocket calculator with a seven-segment display|seven-segment [[liquid-crystal display (LCD) that can perform arithmetic operations]] thumb|upright=.6|A modern scientific calculator with a dot-matrix display

American satellite-based radio navigation service

electronic circuit formed on a small, flat piece of semiconductor material

payment card issued to users as a system of payment

thumb|An old Nixdorf Computer|Nixdorf ATM in Germany () thumb|right|Smaller indoor ATMs dispense money inside convenience stores and other busy areas, such as this off-premises [[Wincor Nixdorf mono-function ICA ATM in Sweden.]] An automated teller machine (ATM) is an electronic telecommunications device that enables customers of financial institutions to perform financial transactions, such as cash withdrawals, deposits, funds transfers, balance or account information inquiries, at any time and without the need for direct interaction with bank staff.

non-destructive technique for imaging internal structures of objects or organisms

kitchen cooking appliance

solid-state semiconductor light source

thumb|Zippers with common teeth variations: metal teeth (top), coil teeth and plastic teeth

a magnifying system capable of showing the interior or surface of a microscopic object by means of directed electron beams

thumb|upright=1.35|French Georges Leygues-class frigate|F70 type frigates (here, ) are fitted with [[variable depth sonar (VDS) type DUBV43 or DUBV43C towed sonars.]] thumb|upright=1.35|A sonar image of the Soviet Navy minesweeper T-297, formerly the Latvian Virsaitis, which was shipwrecked in December 1941 in the [[Gulf of Finland.]]

removable disk storage medium

electrical device that converts the energy of light directly into electricity by the photovoltaic effect

reaction engine which generates thrust by jet propulsion

thumb|Escalator in a Centrum Nauki Kopernik metro station|metro station in [[Warsaw]] thumb|Rows of escalators at the World Trade Center in Dubai thumb|thumbtime=3|Fujitec escalator in action, 2020 thumb|Escalator maintenance test run thumb|upright|Escalators at the Christ the Redeemer (statue)|Christ the Redeemer statue in [[Rio de Janeiro, Brazil]]

camera that captures photographs or video in digital format

payment card connected directly to a cardholder’s bank account

electronic non-volatile computer storage device

upright=1.35|thumb|This CAPTCHA (GIMPY-R, c. 2005) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.

magnetic tape recording format for audio recording and playback

semiconductor-based data storage medium, often used for auxiliary memory to store data

thumb|upright=1.35|The driver and passenger front airbag modules, after having been deployed, in a Peugeot 306

rechargeable battery type

spinning toy

corporate task of optimizing the existing resources in a company

thumb|An electric blender

internal combustion engine using an eccentric rotary design in place of pistons

A pager, also known as a beeper or bleeper, is a wireless telecommunications device that receives and displays alphanumeric or voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to, and originate messages using an internal transmitter.

small, self-adhesive medical dressing used to cover minor skin injuries

300px|thumb|upright=1.7 |The first prototype ammonia maser in front of its inventor [[Charles H. Townes. The ammonia nozzle is at left in the box, the four brass rods at center are the quadrupole state selector, and the resonant cavity is at right. The 24 GHz microwaves exit through the vertical waveguide Townes is adjusting. At bottom are the vacuum pumps.]] thumb|right|260px|A hydrogen radio frequency discharge, the first element inside a #Hydrogen maser|hydrogen maser (see description below)

random-access memory that stores each bit of data in a separate capacitor within an integrated circuit

automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit

fluorescent lamps with folded tubes, often with built-in ballast

type of electron microscope used for looking at atoms

propeller-type water turbine which has adjustable blades

implanted medical device that pumps blood

A walkie-talkie, more formally known as a handheld transceiver or handheld radio, is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings, radio engineer Alfred J. Gross, and to Henryk Magnuski and engineering teams at Motorola. First used for infantry, similar designs were created for field artillery and tank units. After the war, walkie-talkies spread to public safety and eventually commercial and jobsite work.

device that plays DVD discs

event where retail transaction is completed

type of home appliance

type of detergent used for cleaning laundry

class of printers

decorative lamp with container of bolus in clear liquid, which heats up at the bottom and rises before cooling and falling back to the bottom

variant of skydiving activity involving a specially designed suit which offers control surfaces

type of digital video camera commonly employed for surveillance, and which, unlike analog closed circuit television (CCTV) cameras, can send and receive data via a computer network and the Internet

device that determines its position by analyzing GPS satellite signals

method of transmitting information from one place to another by sending pulses of light through an optical fiber

electric device to remove body hair

type of ice cream that is softer than regular ice creams as a result of air being introduced during freezing

synchronous electric motor with switched electronic controller, surface mounted permanent magnets glued to the rotor surface and concentrated windings resulting in trapezoidal counter-electromotive force

device used to collect money in exchange for the right to park a vehicle for a limited amount of time

a power tool used in construction that shoots nails out at high velocity into materials in order to bond them

kitchen utensil

construction equipment used to lay asphalt

absorbent towel made from paper