network.
Router
Communication processor used to route packets of data through different networks, ensuring that the data sent gets to the correct address
Analog signal is represented by a continuous wave form that passes through a communications medium and has been used for voice communication.
Analog devices : Telephone handset, Speaker on computer, iPod earphone
Digital signal
1. Mobile 인터넷 구현기술
1960년대 후반 ARPAN(Advanced Re-search Projects Agency Network)으로부터 시작된 인터넷은 1990년대 중반 HTML(HyperText Markup Language)과 HTML(HyperText Markup Language)과 HTTP(Hyper Text Transport Protocol)를 사용한 World Wide Web(WWW)의 출현으로 일반 대중에게 널리 보급되었다. 이와 더불어 1980년대 초반 처음
for developing and maintaining open source products and technologies, including software, computers, devices, technical formats, and computer languages.
Although Open source software has recently become a hot topic in the press, it has actually been existed since the 1960s and has shown a successful track record to-date.
2. What is open source?
2.1. Freeware?
Freeware allows free use, cop
CK, Ralph Lauren or many other clothing company are using QR code for advertising their products and provide customers with information of style guides, limited collections and video contents.
Yahoo or other web services are using QR code for advertising their web sites.
Audi put a QR code on the screen of Audi CF.
Lego created QR code for advertisement using Lego blocks.
③ payment
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