Inventions of the 1970s

The 20th century has seen some of the best inventions. Here's a list of inventions of the 1970s that made it big!
You would be amazed knowing the kind of things that were invented in the 1970s. They have gained immense popularity over time and prove to be very useful to us. These are the kind of things we can't live without in one way or the other. So lets have a look at the inventions of the 1970s.
Mobile Phones
The first ever mobile phone, DynaTAC 8000X was invented in 1973 by Martin Cooper, the head of communication division at Motorola. It was not the kind of mobile phone we use today, it weighed 28 ounces (790 g) and was 10 inches (25 cm) high. It took nearly 10 hours to charge and offered a talk time of 30 minutes.
Rubik's Cube
One of the best-selling toys across the world, the Rubik's Cube was first invented in 1974 by Erno Rubik, a Hungarian professor of architecture. It was first called the Magic Cube.With the help of the cube Erno Rubik used to explain the spatial relationships to his students in an interesting manner. This later became the best puzzle toy.
Digital Camera
Steven Sasson, an electronic engineer was the inventor of the digital camera. The digital camera was invented in 1975 at the Kodak company. This camera weighed 8 pounds (3.6 kg) and had just 0.01 megapixels. The image was recorded in a cassette tape and it took 23 seconds to process the picture. The camera could only take black-and-white pictures.
Sony first invented the Walkman in 1979. It was a portable device which was used to listen to audio cassettes. Walkman TPS-L2 was the first ever Walkman that went on to sell in Japan. It was a blue-silver metal cased Walkman with AA batteries.
Post-It Notes
This invention happened by accident in 1968 when Dr. Spencer Silver, a scientist at 3M wanted to create a super-strong adhesive but ended up creating a low-tack, reusable, pressure-sensitive adhesive. But it was Art Fry who was attending the seminar of Dr. Spencer Silver where he got an idea of using the adhesive on bookmarks in 1974.
These were some of the most interesting inventions of the 1970s.