いる。
各問いに答えよ。なお,
[1] Have you ever seen the 2D codes which have a special mark on the corners?
For example, you can find the 2D codes in your textbooks. When you scan
them with a tablet computer, you can see pictures or watch videos. Today, a
A lot of people around the world use them in many different ways. This type of (2
2D code was invented by engineers at a car parts maker in Japan.
[2] When cars are produced, many kinds of parts are needed. Car parts makers
have to manage all of the car parts. About 30 years ago, car companies needed
to produce more kinds of cars, and car parts makers had to manage many
different kinds of car parts for each car. At that time, they used barcodes to
manage the car parts, but they could not put a lot of information in one barcode. So, they
used many barcodes. Workers had to scan many barcodes. A worker at a car parts maker
had to scan barcodes about 1,000 times a day. It took a lot of time to scan them. The
0 000742 221101
barcode
(バーコード)
workers needed some help to improve their situation.
[3] The engineers at a car parts maker in Japan knew the situation of the workers. They
started to learn about 2D codes because 2D codes can contain more information than
barcodes. There were already some types of 2D codes in the U.S. One type could contain a
lot of information, but it took a lot of time to scan that type. Another type was scanned very
quickly, but it contained less information than other types. The engineers at the car parts
maker did not use these types. They decided to create a new type of 2D code which had
both of those good points. The engineers needed a long time to create this new type which
could be scanned quickly. Finally, they thought of an idea. They thought, "If a 2D code
has a special mark on the three corners, it can be scanned very quickly from every angle."
In this way, the new type of 2D code with special marks was invented by the engineers at
a car parts maker in Japan.
2D code
