Technology Timeline

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1840s

1850s

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 1860s

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1870s

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1880s

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1890s

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20th century

1900s

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1910s

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1920s

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1930s

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1940s

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1950s

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1960s

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1970s

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1980s

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1990s

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21st century
2000s

Wireless technology may supplement or replace hard wired implementations in security systems for homes or office buildings.

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  • 2001: Full Cellular telephone (phones and modems)

Perhaps the best known example of wireless technology is the cellular telephone and modems. These instruments use radio waves to enable the operator to make phone calls from many locations worldwide. They can be used anywhere that there is a cellular telephone site to house the equipment that is required to transmit and receive the signal that is used to transfer both voice and data to and from these instruments.

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  • 2003: Extensive household Wi-Fi

Wi-Fi is a wireless local area network that enables portable computing devices to connect easily to the Internet. Wi-Fi hot spots have been popular over the past few years. Some businesses charge customers a monthly fee for service, while others have begun offering it for free in an effort to increase the sales of their goods.

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  • 2004: Wireless energy transfer

Wireless energy transfer is a process whereby electrical energy is transmitted from a power source to an electrical load that does not have a built-in power source, without the use of interconnecting wires.

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  • 2005: Computer interface devices
Answering the call of customers frustrated with cord clutter, many manufactures of computer peripherals turned to wireless technology to satisfy their consumer base. Originally these units used bulky, highly limited transceivers to mediate between a computer and a keyboard and mouse, however more recent generations have used small, high quality devices, some even incorporating Bluetooth. These systems have become so ubiquitous that

some users have begun complaining about a lack of wired peripherals. Wireless devices tend to have a slightly slower response time than their wired counterparts, however the gap is decreasing.

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Space exploration in the 21st Century

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