All these inventions have made a huge impact on people in our society and has changed our way of life. some examples that I will mention below, are inventions that I personally and also according to investigations of various types of information sources are the most important in the XXI century.

1947

1).- Microwave

The invention of the microwave is owed Percy Spencer and his passion for chocolate.In 1947, he was released the first commercial microwave oven, the Radarange (1.68 m in height and 340 kg).The first microwave oven hit the market barely bear little resemblance to those we use today and their price was also quite significant: about 900,000 pesetas of those times.The first family-size oven went on sale in 1967 and within ten years of sales exceeded that of microwave ovens gas.The rest of the story is already well known by all: success. 

1952

2).- Barcode

In October 1952 (U.S. Patent # 2,612,994) was his invention by the inventors Joseph Woodland, Jordin Johanson and Bernard Silver in America.

Probably the best example of an exclusive language for machines that can be found by chance, the bar code not only caused the supermarket cashier to charge us in one minute forty items, but gave a whole new and efficient system of identification for a huge range of products and services. But the best part is that there have been only about those little bars next to each other. The new systems already incorporate colors, and even up to two dimensions in the new "QR codes, which makes it safer for  people.