Why the USB port has only 2 sides, but it takes several times to plug correctly. If you often use a USB connection on a computer or smartphone charger, you may have encountered a case of plugging the cable into the wrong drive, and then turning it around is still wrong. For the third time, ie the original rotation, the new standard plug is plugged in, while the original USB connection has only 2 sides. Attaching a USB port is difficult to succeed without first looking from the design with two sides of the original USB port, or USB typeA. To design USB typeC, now popular on Android smartphones, users can plug in standard without having to look, rotate. Why do USB connection developers do not make it possible to rotate 2-way from the beginning? According to the explanation of Ajay Bhatt, the leader of the USB connection team at Intel, his team deliberately designed the original USB port with two different sides. If it is initially developed to achieve any plug-in goal, the USB connection will need double the number of wires and circuit boards, so the cost of port manufacturing will be higher. In order for USB to become a universal connection as its name suggests, Intel’s development team must find a way to reduce costs to the lowest possible level. In order to reduce the rate of misplacing, Mr. Bhatt’s group chose a rectangular design to achieve a successful plug-in rate of 50%, much higher than a circular design. Of course, in practice sometimes users have to try a few times to plug in a USB connection. “Looking back, based on what we’ve all experienced, it’s clear that this connection is not as easy to connect as we envisioned,” Mr Bhatt told NPR. However, it is the decision to reduce the price to a minimum that USB connection is quickly popular and appears on most computers. The USB 1.0 standard was officially announced in 1996, and in 1998 Apple integrated the USB port into the iMac. “It takes time for us to convince people that this technology is irreplaceable,” Bhatt said. Ajay Bhatt is determined to develop USB connectivity from previous experience of using many devices, with complex cables and ports that are difficult to unify. “From both user and developer perspectives, I have found that the interfaces at the time were complex and unfriendly,” Bhatt said. Although the head of the development team, even recognized by Intel as a co-creator of a USB connection, Bhatt doesn’t get rich from this connection. While working at Intel, he also played a role in launching PCI Express, a popular high-speed connection on all current computers. “In fact this is a collective achievement. I think that when everyone accepts your idea, it was successful. The reputation should be for that technology itself,” Bhatt said.