Do you know how Ctrl+alt+delete got here?

In the spring of 1981, David Bradley was just an ordinary programmer who was involved in a project (code-named Acorn), designing PCs for IBM, a task that was urgent because Apple and RadioShack had already started selling small stand-alone computers. It took 3-5 years of work, Acorn only a year. The problem with the program staff at the time was that every time a computer encountered a coding failure, they had to manually reboot the entire system, and the reboot would automatically run a series of memory tests, which was time-consuming. "Sometimes, in order to find out the crux of the problem, you need to restart the system every 5 minutes." "This tedious test simply crashes programmers. As a result, Bradley created a keyboard shortcut Ctrl+alt+del to reset the system without a memory test. He never thought it would make him a programming hero, and would be chased by others to sign on the keyboard. Bradley joined IBM in 1975 and was committed to Datamaster development by 1978, the earliest PC prototype of IBM. He became the 12th of 12 engineers in the Acorn team in September 1980, and in the 5th month after joining the Acorn Project, he spent 5 minutes creating Ctrl+alt+del. According to Bradley recalls, then chose this group of shortcuts because, delete away from the other two keys very far, will not be inadvertently triggered accidentally. And at the time, it was mainly for the use of their team members, he never thought that one day will be so popular. The team completed the Acorn Project in the fall of 1981, with IBM PCs listed and sold well beyond the estimated millions of units. Users use it to play games and edit documents, but few people know Ctrl+alt+del shortcuts. Until the beginning of the 1990, Microsoft Windows turned out. Windows came out, almost all of the PC will encounter a blue screen crash, the blue screen will prompt you to press and hold Ctrl+alt+del shortcut keys Restart the computer, since then, Ctrl+alt+del world-renowned. 2001, the San Jose Science and Technology Innovation Museum held an event commemorating the 20 anniversary of the launch of the IBM PC, and in 20 years, IBM PCs sold 500 million units worldwide. After dinner, the industry leaders sat together for a group discussion, including Microsoft boss Bill Gates. The first question, however, was not directed at Gates, but with David Bradley, who was surprised to learn that the Ctrl+alt+del shortcuts that had taken 5 minutes to create had made him so well-known. Bradley smiled and said, "I just got the light, maybe I invented it, but it was bill that really made it." ”