It is very common to have errors in the software. Even if we develop software with great care, you always have a mistake.
These bugs seem to be small and boring. But sometimes these small disasters can cause disasters and lead to a huge loss of money and even to human life.
Here are some of the most famous, devastating or most interesting mistakes of recent history:
1.AT & T HANGS HIS LONG-DISTANCE CALL (1990):
For nine hours in January 1990 no AT & T customers could make long-distance calls. The problem was software that controlled the long-term relay of the company, the software that was just updated. AT & T ended up charging $ 60 million in fees that day, a very costly mistake.
2.ARIANE 5 EXPLOSION:
Ariane 5 was a rocket that was used to launch a space ship. It exploded only about 40 seconds after his release. The crush was referred to as a very common mistake, the integer overflow. It occurs when we try to store a number that is greater than the maximum number that can be stored in a memory. This incident resulted in a loss of $ 370 million.
3. Y2K BUG
During the 1960s, computer engineers used 2 digits to represent years. Thus 1970 would be represented as 70. They used only 2 digits to reduce the size to store the data. This method worked well until 31 December 1999. But on January 1, 2000 many computers would have read 1900. To correct this small mistake, engineers have to do a lot of extra work.
4. THE MATHEMATICAL ERROR OF THE PENTIUM CHIP (1993):
Thanks to a programming error, the famous Intel Pentium chip proved to be very bad in mathematics. The actual mistakes he made were quite small (over eight quarters of a decimal) and limited to certain types of division problems. But irony, oh, irony! – From a computer chip that made math errors, the problem exploded into the mother of all public relations disasters. After minimizing the severity of the problem, causing even more public response, the company finally agreed to someone with a fixed chip.
5. THE MARS CLIMATE ORBITER DECAYS INTO SPACE (1998):
NASA’s $ 655 million robotic space exploration plunged into the upper atmosphere of Mars at a bad angle and burned. The problem? In the software running the ground computers, the output of the propellers was calculated in the faulty units (inches seconds instead of Newton seconds, as specified in the NASA Lockheed contract). Fortunately, the software for post-Mars missions was successful.
6. PAYPAL ERROR
Chris Reynolds of Pennsylvania became the richest man in the world when PayPal mistakenly credited $ 92 trillion in his account.
7.WINDOWS BLOCKS HACKERS THAT ARE NOT SOFTWARE (2007):
For 19 hours on August 24, 2007, anyone who tries to install Windows has been installed by Microsoft Windows Genuine Advantage Software has installed illegal copies. When he bought Windows Vista, he discovered some features were turned off as a penalty. The error this time was both human and traditional: someone accidentally installed an older version of the Genuine Advantage software on Microsoft servers.
8.APPLE MAPS GIVES US DIRECTIONS FOR NOWHERE (2012)
In its rivalry with Google, Apple decided to get rid of the very popular Google Maps app that had always come in new iPhones and replace it with a new card application that Apple had written ,
But on Apple maps, whole lakes, stations, bridges and tourist attractions were either missing or wrongly marked. The Washington Monument crossed the street. Riverside Hospital appeared in Jacksonville, Florida, although it was a Publix supermarket 11 years earlier. In the 3-D view of the application, bridges and dams seemed to melt into the water and Auckland, New Zealand’s main railway station was in the middle of the ocean.
9. MISSING PATRIOT MISSILE SOFTWARE
28 American soldiers were killed and 98 wounded when an Iraqi rocket hit their barracks. The Patriot missile system has failed to track and intercept a missile bug that targets the radar and the patriot tracking software.
10. THE GANGNAM STYLE HAS BROKEN YOUTUBE
When YouTube was developed, a 32-bit signed integer was used to store the number of video views. At that time, no one thought that a video would get more views on the maximum size of the full 32-bit sounds. But the Gangnam Style video has more than the limit. Once the limit was exceeded, the number of views began to show a negative value. Google corrected the error by changing the number of views to a signed 64-bit integer.