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2. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_Code

   The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

3. QR code CUSTOMS. WiFi ? Or download code - Japan Forum

   www.tripadvisor.com/ShowTopic-g294232-i525-k...

   Now with only 1 QR code, you have to do your own passport scan between immigration and customs. Customs is apparently done by facial recognition. You just walk through an automatic gate without any officer physically inspecting your passport. I have always used screen capture of the QR code. Edited: 3:10 am, April 02, 2024.

4. Barcode - Wikipedia

   en.wikipedia.org/wiki/Barcode

   Barcode. A UPC-A barcode. A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called ...

5. List of WLAN channels - Wikipedia

   en.wikipedia.org/wiki/List_of_WLAN_channels

   Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.

6. How do I use my tickets that I purchased online... - Tripadvisor

   www.tripadvisor.com/FAQ_Answers-g42499-d265969-t...

   1 answer. Chrissy B. 0. Votes. They email you a ticket and/or you can view your tickets on their app You can show them the QR code on your phone from the ail or app, or print out your ticket and they can scan the QR code on the paper copy at the gate. over a year ago.

7. URGENT- Travelodge booked through HOtels.com, wifi code ...

   www.tripadvisor.com/ShowTopic-g186338-i17-k...

   Just checked in to our Travelodge at Gatwick, which we booked through Hotels.com. The front desk is claiming we should have a wi-fi code from Hotels.com, which we do not (did not come with the e-mail, which it did when booking with Travelodge...