May 2019
Beginner to intermediate
296 pages
6h 58m
Japanese
Content preview from IT用語図鑑 ビジネスで使える厳選キーワード256
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33
1
I
T
関連用語
用語に関連する話
用語の使用例
QR
コード
2 次 元 バーコードの 業 界 標 準
通常のバーコードは縦線の横幅のみで情報を表現するため、表現できるデータ量が少な
いのに対し、QR コードでは 2 次 元にすることで文 章など多くのデータを表 現できる。URL
などを格 納 するだけ でなく、近 年 で は 決 済 などに 使 用され 、電 子マネーとしての 役 割を果
たしている。
決済への応用
スマホなどを活用して店頭でQR
コードを読み取り、金額を入力し
て決済する方法で、小規模店舗で
も導入コストを抑えて、簡単に電
子決済を導入できる。
3か所の大きな四角形
QRコードのバーコードでは、正
方形の4つの角のうち3か所に大
きな四角いマークを配置し、これ
を認識することでどの方向から
でも読み込めるようにしている。
複 数 の バ ージョン が ある
QRコードには、格納したい情報
の量によって複数のバージョン
がある。それぞれ白と黒の点の数
が異なり、格納したいデータが多
いとサイズも大きくなる。
「印刷物にはQRコードを印刷して、スマホでアクセスしてもらおう。」
URLとURI
……P123
Keyword
020
▶
きゅー あ ーるこーど
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.